"This universe is finite, its resources, finite...if life is left unchecked, life will cease to exist. It needs correcting," said Thanos, the Mad Titan before he snapped his fingers and killed half of all life on Earth. While movie fanatics and conspiracy theorists may have thought Marvel was hinting at something in the future, the cinematic universe's most popular villain was actually quoting his intellectual godfather, Paul Ehrlich, almost verbatim. Paul R. Ehrlich, who recently passed away on March 13, 2026, was a popular and controversial American biologist and former Bing Professor of Population Studies at Stanford University. In 1968,...