The curved pelvic bone that gives the butt its prominence likely developed as our weight moved upward and our muscular needs shifted. So why did our ancestors develop such a unique cushion? Evolutionary biologists’ best guess is that our shapely rears help us walk upright. But none pack anything close to the same proportions as us. Many other creatures have muscle and fat padding their backsides, and some even have butt cheeks. A booty is, in fact, a unique feat of evolution: Out of any species, humans have the most junk in their trunks. Unlike with a knee or an elbow, Radke argues, when it comes to the tuchus, we’re far more likely to think about form than function-even though it features the largest muscle in the human body.įor all the scrutiny we spare them (outside of when we’re trying on new jeans) our butts aren’t mere aesthetic flourishes. Radke goes on to explain that our feelings about our hindquarters often have more to do with race, gender, and sex than with the actual meat of them. “Butts are a bellwether,” writes journalist Heather Radke in her 2022 book Butts: A Backstory. Few muscles in the human body carry as much cultural clout as the gluteus maximus.
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