Mutual Yield is the surplus created when mutual order/revolution is taken into account when a process, or action is made by people. Mutual Yield is the opposite of mutual cost. Mutual cost is the price to be paid for not working along with mutual order/revolution. This cost is paid at the time of a non-mutual action or sometime in the future. Self-interest is at the basis of mutual cost. People or animals that work in self-interest will create mutual costs to themselves or others including their environment. When individuals attempt to take a profit or an outsized portion of a surplus there will be a mutual cost to pay somewhere down the line.