Economic Surplus - The Magic That Comes From Trading With Each Other

Economic surplus is the measure of how well off we are as a society. Surplus helps us understand that there's more we can do to make our lives and the world better. It also helps us quatify the loss of society from things like pollution. So when you think how good your life is, don't just look at how much money you spend. Look at how much joy you get from it. And if you can help grow the pie and make it more equally distributed, you'll have really succeeded in making the world a better place.