Vilfredo Pareto proposed the concept of 'Circulation of elite'. It can be explained in atleast two ways. One of them is that the 'circulation of elite' is the process in which one elite replaces the another. The second reference is that the movement of people from non-elite groups to elite groups and vice-versa.
Pareto explained that some people in elite group have degenerative qualities. They do not get power based on merit or achievement. This elite will be overthrown by another group of elite that has superior qualities. He mentioned support of the people helps the new elite to overthrow the ruling elite.