For much of history, societies have violently oppressed ethnic, religious, and sexual minorities. It is no surprise that many who passionately believe in social justice came to believe that members of marginalized groups need to take pride in their identity to resist injustice.

Populist rage, ideological fracture, economic and technological shocks, geopolitical dangers, and an international system studded with catastrophic risk—the early decades of the 21st century may be one of the most revolutionary periods in modern history. But they are not the first. Humans have lived, and thrived, through more than one great realignment. What makes an age a revolutionary one? And how do they end?

In Why We’re Polarized, Klein reveals the structural and psychological forces behind America’s descent into division and dysfunction. Neither a polemic nor a lament, this book offers a clear framework for understanding everything from Trump’s rise to the Democratic Party’s leftward shift to the politicization of everyday culture. America is polarized, first and foremost, by identity. Everyone engaged in American politics is engaged, at some level, in identity politics.

As the child of refugees of World War II Europe and a renowned philosopher and scholar of propaganda, Jason Stanley has a deep understanding of how democratic societies can be vulnerable to fascism: Nations don’t have to be fascist to suffer from fascist politics. In fact, fascism’s roots have been present in the United States for more than a century.

As one of the few black students in his philosophy program at Columbia University years ago, Coleman Hughes wondered why his peers seemed more pessimistic about the state of American race relations than his own grandparents–who lived through segregation. The End of Race Politics is the culmination of his years-long search for an answer.