This document discusses theories of race in the late 19th and early 20th centuries. It describes how scientists like Johann Blumenbach and Samuel Morton developed pseudoscientific theories to try to prove white racial superiority, such as by claiming Caucasians had larger brains and were more beautiful. Their work was used to justify discriminatory policies and shape public thinking despite being based on subjective judgments rather than facts. The document examines how these theories became integral to government policies and legislation that discriminated unfairly between citizens.