This whole republican brain thing started win that a john joe starticlote was two thousand three, and it was differences between liberals and conservatives self identified. So this self report data on the big five personality dimensions. And all this is kind of spun in a way to explain the way republicans vote from 19 95 till whenever the paper is published. But if we actually look at the last two centuries of however conservatives and liberals are defined you're not going to see that kind of polarization.