To Be A Happy Person, Understand Marginal Utility

I can see why two generations of economists, from the 1870s-1910s, were in a total meltdown frenzy over the concept of marginal utility. This is an idea that can save the world. I have a theory that if you understand it, you will be more civil. More friendly. More subtle and understanding. You will understand yourself and those around you better. It underscores the sheer complexity of human decision-making and shows why governments are utterly incapable of wise management of the world.