Q: What are some things that Dr. Leakey cites as proof of our humanity?
A: What Dr. Leakey are you talking about? There are three generations of Leakeys involved in anthropology/archaeology. I'm assuming you meant Louis Leakey? He was big on tool use being part of the major proof of our humanity. But he would say that, because he dug up a lot of Homo habilis (habilis roughly translates to 'handy man' - and it was named because of the large amounts of stone tools that were found around/near the remains)