Donald Trump’s victory has become an occasion for soul-searching and fierce debate among liberals, leftists, and their allies. But lost in the mix of all the recriminations and arguments is a clear-eyed attempt to imagine what life for Americans will actually look like under Trump—and then, what we want it to be after he is out of office. If we are to look beyond the next four years, we must create a movement that is not simply anti-Trump, but that presents left politics as a compelling alternative. In preparing to fight the anti-labor, anti-immigrant, racist, and misogynist policies of a Trump administration, history can help us understand how activists and radicals in previous eras of social turmoil fought for a better future.