It's been a while since I was in a straight up fist fight but fortunately there's a new theory that says male human facial features evolved to withstand punches. If true that helped a lot during my all boys private school days.
Jaw, cheek, eye and nose structures are most likely to be damaged in fist fights and are also noticeably different between men and women.
As the BBC reports:
For many years, this extra strength was seen as an adaptation to a tough diet including nuts, seeds and grasses. But more recent findings, examining the wear pattern and carbon isotopes in australopith teeth, have cast some doubt on this "feeding hypothesis".
The authors of a paper published in the journal Biological Reviews, argue that the changes evolved from fighting over females and resources, suggesting that violence drove key evolutionary changes.
ETA: Corpore Metal reminded me in the comments that human hands may have evolved to make us better punchers as well.
Image by Cicero Moraes