system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How did the cow, chicken, and pig become the staple meats of humanity?
gpt
I know this isn't an answer to the question, but goat is more commonly eaten than beef or pork, and by quite a bit.  Pork is eaten hardly at all in a vast belt from Indonesia to Nigeria, and beef is much more common in N America and Europe than in the rest of the world.

The real worldwide staples would be (if you don't count fish) goat and chicken, probably, with pork and beef being of lesser import.