giacomo rizzolatti let's. in 1996 he discovered cells known as miro neurons. they are thought to play many crucial roles in social interbr section. he's a professor. gerald fischbach, victims robbed of their social skill. he's the director of autism research at the simons foundation. and also my good friend and cohost, dr. eric kandel. he is a noble laureate as you know, a professor at columbia university and a howard hughes medical investigator and he has been a good friend to this broadcast. we could not do it without him. he has been the person who h linked our curiosity to an extraordinary amount of research and achievement understanding the brain. so i begin with this question in this episode. social brain. tell me what we mean by that. >> as you pointed out, very nicely in your introduction, we are immensely social beings. we use our social behavior to find a partner, to build a many family, to build a community, to build a culture. and also as you indicate, that can go into disarray and lead to aggression. social behavior is so important that it is cons