Http://nationalinterest.org/blog/the-buzz/why-ulysses-s-grant-was-one-americas-greatest-leaders-17952
According to my research, it takes 164.79 years
It is called social stratification. The idea of social stratification is frequently utilized and deciphered diversely inside particular hypotheses. In human science, for instance, advocates of activity hypothesis have recommended that social stratification is ordinarily found in created social orders, wherein a predominance chain of command might be fundamental with a specific end goal to keep up social request and give a steady social structure. Supposed clash hypotheses, for example, Marxism, point to the detachment of assets and absence of social versatility found in stratified social orders.