The ways people think about matters both big and small, from climate change to daily tasks, impact the outcomes. Throughout the history of science and society, key insights arose through a thought process of simplification and subtraction, though the human tendency leans towards complication and addition. Today I discuss the power of subtraction with Leidy Klotz. Leidy is a professor at the University of Virginia, where he studies the science of design. He is the author of Subtract, published in 2021 by Flatiron Books.