Fossil reveals human ancestors butchered one another for reasons beyond ritual

[wnylib]

4. Jane Goodall reported seeing cannibalism among chimps.

She described a female chimp grabbing chimp babies from other mothers to feed to her own offspring. The mother's whose babies were taken screeched and tried to fend off the attacking chimp. On one occasion, an alpha male came to the rescue of the mother that he had bred with and saved the baby from being stolen. Since chimps do not usually form pair bonds, it was unusual that the male intervened.

So it looks like our ancestors shared that cannibalism behavioral trait with our nearest ape relatives.