JL;DR SUMMARY Prof. Amir Teicher from Tel Aviv University delves into his book "Social Mendelism: Genetics and the Politics of Race in Germany, 1900-1948," examining how a foundational genetic theory from the 19th century was manipulated within the context of racial classification in the following decades. A way out west there was a fella, fella I want to tell you about, fella by the name of Jeff Lebowski.