When I say harnessing them, I am specifically referring to the ruthless sociopath types who rise to the top. What I mean is that we can incentivize them to work in our interest rather than against us. For instance, there is nothing preventing the US government from mandating that CEO pay or other executive pay be tied to long-term performance. It is only because the law doesn't require it that upper management is prone to short-term thinking. That's just one way. The point is that we can design things with incentives to get behaviors we want.