What he tried to prove is something that each one of us already know but don´t have how to do. The "evolution" of humanity is restricted to some specific sectors, like technology, biological and so on. But when it comes to internal evolution, specific about how to treat different people, we still being the same shit ever. Two thousand years, forty ... don´t matter.

An simple example. I´m from Brazil (sorry by my poor english) ... and i play World of Warcraft as well. On the game, one of the social rules (no legal rules) is to talk in english. No problem. We do our best and it´s good to practice another language sometimes. BUT ... when we meet other brazilian folks and start talking in portuguese close to american guys ... all the hell start. They (not everybody off course) tend to offend us, our country and start saying a lot of bad things of us. We don´t take it personal, most part of the time, but it´s very weird because the tolerance to out of box things (like another idioms) and the treatment to those who make things in the "wrong" way is far too bad. I´m not saying that the scientist was correct, even us who talks in portuguese, but the reaction and the self control of the average human still being to naive. And, i think, he proves it very well.