and ashley merryman. that pretty much it talks about this. let me start with some of the issues just raised in the introduction about the notions of conventional wisdom that cooperation is always better than competition. >> you know, even if you go all of the way down to the hormone level, the hormone that is most symbolic in competition is testosterone. scholars bring women into the laboratory and have them play money games where they steal with their opponent or share with their upon it, right? and they give them either testosterone or a placebo. the women you plate selfishly assumed they had been given testosterone. they were given a placebo. the women who played cooperatively had been given testosterone. most of us in our daily life to the extent we have to compete with the rat race and the world, we are collaborating with other people at the same time. the two are hand in hand. tavis: is competition overrated or underrated? >> i think that is a great question. i think it depends on the context. michael phelps, great. the country needs to