Incentive is an underlying mechanism that drive society at any scale including individual, group of individuals, and human population as a whole. Incentive is an abstract concept. Physically, incentives are driven by money, refer to my blog titled “Incentives of Owning Money” for more detail. Another important concept is to accept that money is an indirect form of freedom and power, refer to my blog titled “Blog Freedom and Power are two sides of the same coin” for more detail.