His quote is important so we learn our lessons from the past so we don't repeat them in the future. The post-WWII generation needs to learn about the tragedy of the Holocaust along with how Hitler and the Nazis were able to rise to power, and we need to know how to act when we see parallels to this in the modern world.
How are scientists using evolutionary theory in efforts that can help people? Evolutionary theory is being used to understand, and help fight, the emergence of antibiotic-resistant diseases and other new diseases, and even to guide thinking in computer science.
