What Makes Us Human?

This question was posed to me by one asking with a sarcastic tone.
Here is my response:

Human beings are social creatures; it is through working together that we have met our survival needs from our first days on the African savannah to the busy life in the 21st century city. We share information about hunting and gathering and building; we collaborate and trade, express empathy and sympathy, beg and borrow and steal all through our abilities to take what is in our brains and transmit it into others’ brains. We can be both recipients and senders in this communication transfer and we together we can create and test models through which we can eat while we avoid being eaten, protect ourselves from extremes in weather, navigate the world, understand what cannot be seen, and contemplate our place in the cosmos.