Last month, Daniel Ellsberg and Edward Snowden had a public conversation about democracy, transparency, whistleblowing and more. In the course of it, Snowden – who was of course Skyping in from Moscow – said that without Ellsberg’s example he would not have done what he did to expose the extent to which the NSA was spying on millions of ordinary people. It was an extraordinary declaration. It meant that the consequences of Ellsberg’s release of the top-secret Pentagon Papers in 1971 were not limited to the impact on a presidency and a war in the 1970s. The consequences were not limited to people alive at that moment. His act was to have an impact on people decades later – Snowden was born 12 years after Ellsberg risked his future for the sake of his principles. Actions often ripple far beyond their immediate objective, and remembering this is reason to live by principle and act in hope that what you do matters, even when results are unlikely to be immediate or obvious.

The most important effects are often the most indirect. I sometimes wonder when I’m at a mass march like the Women’s March a month ago whether the reason it matters is because some unknown young person is going to find her purpose in life that will only be evident to the rest of us when she changes the world in 20 years, when she becomes a great liberator.

Hope is a belief that what we do might matters, an understanding that the future is not yet written. It’s informed, astute open-mindedness about what can happen and what role we may play in it. Hope looks forward, but it draws its energies from the past, from knowing histories, including our victories, and their complexities and imperfections. It means not being the perfect that is the enemy of the good, not snatching defeat from the jaws of victory, not assuming you know what will happen when the future is unwritten, and part of what happens is up to us.

We are complex creatures. Hope and anguish can coexist within us and in our movements and analyses. There’s a scene in the new movie about James Baldwin, I Am Not Your Negro, in which Robert Kennedy predicts, in 1968, that in 40 years there will be a black president. It’s an astonishing prophecy since four decades later Barack Obama wins the presidential election, but Baldwin jeers at it because the way Kennedy has presented it does not acknowledge that even the most magnificent pie in the sky might comfort white people who don’t like racism but doesn’t wash away the pain and indignation of black people suffering that racism in the here and now. Patrisse Cullors, one of the founders of Black Lives Matter, early on described the movement’s mission as “rooted in grief and rage but pointed towards vision and dreams”. The vision of a better future doesn’t have to deny the crimes and sufferings of the present; it matters because of that horror.

I have been moved and thrilled and amazed by the strength, breadth, depth and generosity of the resistance to the Trump administration and its agenda. I did not anticipate anything so bold, so pervasive, something that would include state governments, many government employees from governors and mayors to workers in many federal departments, small towns in red states, new organizations like the 6,000 chapters of Indivisible reportedly formed since the election, new and fortified immigrant-rights groups, religious groups, one of the biggest demonstrations in American history with the Women’s March on 21 January, and so much more.

There’s a bookstore I love in Manhattan, the Housing Works bookshop, which I’ve gone to for years for a bite to eat and a superb selection of used books. Last October my friend Gavin Browning, who works at Columbia University but volunteers with Housing Works, reminded me what the name means. Housing Works is a spinoff of Act Up, the Aids Coalition to Unleash Power, founded at the height of the Aids crisis, to push for access to experimental drugs, bring awareness to the direness of the epidemic, and not go gentle into that bad night of premature death.

What did Act Up do? The group of furious, fierce activists, many of them dangerously ill and dying, changed how we think about Aids. They pushed to speed up drug trials, deal with the many symptoms and complications of Aids together, pushed on policy, education, outreach, funding. They taught people with Aids and their allies in other countries how to fight the drug companies for affordable access to what they needed. And win.

Browning recently wrote: “At the start of the 1990s, New York City had less than 350 units of housing set aside for an estimated 13,000 homeless individuals living with HIV/Aids. In response, four members of the Act Up housing committee founded Housing Works in 1990.” They still quietly provide a broad array of services, including housing, to HIV-positive people 27 years later. All I saw was a bookstore; I missed a lot. Act Up’s work is not over, in any sense.

An old woman said at the outset of Occupy Wall Street “we’re fighting for a society in which everyone is important”, the most beautifully concise summary of what a compassionately radical, deeply democratic movement might aim to do. Occupy Wall Street was mocked and described as chaotic and ineffectual in its first weeks, and then when it spread nationwide and beyond, as failing or failed, by pundits who had simple metrics of what success should look like. The original occupation in lower Manhattan was broken up in November of 2011, but many of the encampments inspired by it lasted far longer.

Occupy launched a movement against student debt and opportunistic for-profit colleges; it shed light on the pain and brutality of the financial collapse and the American debt-peonage system. It called out economic inequality in a new way. California passed a homeowner’s bill of rights to push back at predatory lenders; a housing defense movement arose in the wake of Occupy that, house by house, protected many vulnerable homeowners. Each Occupy had its own engagement with local government and its own projects; a year ago people involved with local Occupies told me the thriving offshoots still make a difference. Occupy persists, but you have to learn to recognize the myriad forms in which it does so, none of which look much like Occupy Wall Street as a crowd in a square in lower Manhattan.

Similarly, I think it’s a mistake to regard the gathering of tribes and activists at Standing Rock, North Dakota, as something we can measure by whether or not it defeats a pipeline. You could go past that to note that merely delaying completion beyond 1 January cost the investors a fortune, and that the tremendous movement that has generated widespread divestment and a lot of scrutiny of hitherto invisible corporations and environmental destruction makes building pipelines look like a riskier, potentially less profitable business.

To know history is to be able to see beyond the present, to remember the past gives you capacity to look forward as well, it’s to see that everything changes and the most dramatic changes are often the most unforeseen. I want to go into one part of our history at greater length to explore these questions about consequences that go beyond simple cause and effect.

The 1970s anti-nuclear movement was a potent force in its time, now seldom remembered, though its influence is still with us. In her important new book Direct Action: Protest and the Reinvention of American Radicalism, LA Kauffman reports that the first significant action against nuclear power, in 1976, was inspired by an extraordinary protest the previous year in west Germany, which had forced the government to abandon plans to build a nuclear reactor. A group that called itself the Clamshell Alliance arose to oppose building a nuclear power plant in New Hampshire. Despite creative tactics, great movement building, and extensive media coverage against the Seabrook nuclear power plant in New Hampshire, the activists did not stop the plant.

You can call that a failure, but Kauffman notes that it inspired people around the country to organize their own anti-nuclear groups, a movement that brought about the cancellation of more than 100 planned nuclear projects over several years and raised public awareness and changed public opinion about nuclear power. Then she gets into the really exciting part, writing that the Clamshell Alliance’s “most striking legacy was in consolidating and promoting what became the dominant model for large-scale direct-action organizing for the next 40 years. It was picked up by … the Pledge of Resistance, a nationwide network of groups organized against US policy in central America” in the 1980s.

“Hundreds more employed it that fall in a civil disobedience action to protest the supreme court’s anti-gay Bowers vs Hardwick sodomy decision,” Kauffman continues. “The Aids activist group Act Up used a version of this model when it organized bold takeovers of the headquarters of the Food and Drug Administration in 1988 and the National Institutes of Health in 1990, to pressure both institution to take swifter action toward approving experimental Aids medication.” And on into the current millennium. But what were the strategies and organizing principles they catalyzed?

The short answer is nonviolent direct action, externally, and consensus decision-making process, internally. The former has a history that reaches around the world, the latter that stretches back to the early history of European dissidents in North America. That is, nonviolence is a strategy articulated by Mohandas Gandhi, first used by residents of Indian descent to protest discrimination in South Africa on 11 September 1906. The young lawyer’s sense of possibility and power was expanded immediately afterward when he traveled to London to pursue his cause. Three days after he arrived, British women battling for the right to vote occupied the British parliament, and eleven were arrested, refused to pay their fines, and were sent to prison. They made a deep impression on Gandhi.

He wrote about them in a piece titled “Deeds Better than Words” quoting Jane Cobden, the sister of one of the arrestees, who said, “I shall never obey any law in the making of which I have had no hand; I will not accept the authority of the court executing those laws …” Gandhi declared: “Today the whole country is laughing at them, and they have only a few people on their side. But undaunted, these women work on steadfast in their cause. They are bound to succeed and gain the franchise …” And he saw that if they could win, so could the Indian citizens in British Africa fighting for their rights. In the same article (in 1906!) he prophesied: “When the time comes, India’s bonds will snap of themselves.” Ideas are contagious, emotions are contagious, hope is contagious, courage is contagious. When we embody those qualities, or their opposites, we convey them to others.

That is to say, British suffragists, who won limited access to the vote for women in 1918, full access in 1928, played a part in inspiring an Indian man who 20 years later led the liberation of the Asian subcontinent from British rule. He, in turn, inspired a black man in the American south to study his ideas and their application. After a 1959 pilgrimage to India to meet with Gandhi’s heirs, Martin Luther King wrote: “While the Montgomery boycott was going on, India’s Gandhi was the guiding light of our technique of nonviolent social change. We spoke of him often.” Those techniques, further developed by the civil rights movement, were taken up around the world, including in the struggle against apartheid at one end of the African continent and to the Arab Spring at the other.

That’s a lot to take in. But let me put it this way. When those women were arrested in parliament, they were fighting for the right of British women to vote. They succeeded in liberating themselves. But they also passed along tactics, spirit, and defiance. You can trace a lineage backward to the anti-slavery movement that inspired the American women’s suffrage movement, forward right up to John Lewis standing up for refugees and Muslims in the Atlanta airport this year. We are carried along by the heroines and heroes who came before and opened the doors of possibility and imagination.

My partner likes to quote a line of Michel Foucault: “People know what they do; frequently they know why they do what they do; but what they don’t know is what what they do does.” You do what you can. What you’ve done may do more than you can imagine for generations to come. You plant a seed and a tree grows from it; will there be fruit, shade, habitat for birds, more seeds, a forest, wood to build a cradle or a house? You don’t know. A tree can live much longer than you. So will an idea, and sometimes the changes that result from accepting that new idea about what is true, right, just remake the world. You do what you can do; you do your best; what what you do does is not up to you.

That’s a way to remember the legacy of the external practice of nonviolent civil disobedience used by the anti-nuclear movement of the 1970s, as with the civil rights movement of the 1960s, which did so much to expand and refine the techniques.

There are terrible stories about how diseases like Aids jump species and mutate. There are also ideas and tactics that jump communities and mutate, to our benefit. There is an evil term, collateral damage, for the people who die unintentionally: the civilians, nonparticipants, etc. Maybe what I am proposing here is an idea of collateral benefit.

What we call democracy is often a majority rule that leaves the minority, even 49.9% of the people – or more if it’s a three-way vote – out in the cold. Consensus leaves no one out. After Clamshell, it jumped into radical politics and reshaped them, making them more generously inclusive and egalitarian. And it’s been honed and refined and used by nearly every movement I’ve been a part of or witnessed, from the anti-nuclear actions at the Nevada Test Site in the 1980s and 1990s to the organization of the shutdown of the World Trade Organization in late 1999, a victory against neoliberalism that changed the fate of the world, to Occupy Wall Street in 2011 and after.

So what did the Clamshell Alliance achieve? Everything but its putative goal. Tools to change the world, over and over. There are crimes against humanity, crimes against nature, and other forms of destruction that we need to stop as rapidly as possible, and the endeavors to do so are underway. They are informed by these earlier activists, equipped with the tools they developed. But the efforts against these things can have a longer legacy, if we learn to recognize collateral benefits and indirect effects.

Even losing can be part of the process: as the bills to abolish slavery in the British empire failed over and over again, the ideas behind them spread, until 27 years after the first bill was introduced, a version finally passed. You will have to remember that the media usually likes to tell simple, direct stories in which if a court rules or an elective body passes a law, that action reflects the actors’ own beneficence or insight or evolution. They will seldom go further to explore how that perspective was shaped by the nameless and unsung, by the people whose actions built up a new world or worldview the way that innumerable corals build a reef.

The only power adequate to stop the Trump administration is civil society, which is the great majority of us when we remember our power and come together. And even if we remember, even if we exert all the pressure we’re capable of, even if the administration collapses immediately, or the president resigns or is impeached or melts into a puddle of corruption, our work will only have begun.

That job begins with opposing the Trump administration but will not end until we have made deep systemic changes and recommitted ourselves, not just as a revolution, because revolutions don’t last, but as a civil society with values of equality, democracy, inclusion, full participation, a radical e pluribus unum plus compassion. As has often been noted, the Republican revolution that allowed them to take over so many state houses and take power far beyond their numbers came partly from corporate cash, but partly from the willingness to do the slow, plodding, patient work of building and maintaining power from the ground up and being in it for the long run. And partly from telling stories that, though often deeply distorting the facts and forces at play, were compelling. This work is always, first and last, storytelling work, or what some of my friends call “the battle of the story”. Building, remembering, retelling, celebrating our own stories is part of our work.

This will only matter if it’s sustained. To sustain it, people have to believe that the myriad small, incremental actions matter. That they matter even when the consequences aren’t immediate or obvious. They must remember that often when you fail at your immediate objective – to block a nominee or a pipeline or to pass a bill – that even then you may have changed the whole framework in ways that make broader change inevitable. You may change the story or the rules, give tools, templates or encouragement to future activists, and make it possible for those around you to persist in their efforts.

To believe it matters – well, we can’t see the future. We have the past. Which gives us patterns, models, parallels, principles and resources, and stories of heroism, brilliance, persistence, and the deep joy to be found in doing the work that matters. With those in our pockets, we can seize the possibilities and begin to make hopes into actualities.