The period from the 1920s to the present is marked by the rise of eugenics, the expansion and hardened enforcement of immigration laws, legal apartheid, the continuance of race pseudoscience, and the rise of human and civil rights discourse in response. Eugenics programmes in the early 20th century focused on sterilization and evolved into unimaginable horrors with the Nazi regime in Germany. Countries in Europe and across the Americas have used immigration policies to shape the racial composition of their territories. Legal apartheid has been slowly dismantled in the United States and South Africa yet continues to have enduring consequences. Eugenics today persists in various permutations of race science. Leaders and activists have drawn from civil and human rights discourses to fight back against the persistence of racial inequalities and racialized discourses in the 21st century. We can look back on history and see that the Holocaust was a tragedy of historic proportions, yet the tradition of scientific racism that led to the Holocaust continues. We can look back and see that the internment of the Japanese during the Second World War was a horrific injustice, yet detention camps filled with Central Americans continue to proliferate in the United States and refugee camps around the world are overflowing. As this volume makes clear, racism is an ideology that is adept at changing with the times, yet never dissipates