Walls needn't be impenetrable to divide people, as Cuba's Trocha made all too clear.
The U.S. saw an increase in anti-Semitic and anti-immigrant sentiments in the period between World War I and World War II. Here's why it matters to know that history today.
The idea of white victimhood played an important part in Donald Trump's rise. The South African brand of white supremacy has made a tangible contribution to this narrative of victimhood.