Pope John XXIII
Pacem in Terris §87
Pacem in Terris: On Establishing Universal Peace in Truth, Justice, Charity, and Liberty
87 As we know from experience, men frequently differ widely in knowledge, virtue, intelligence and wealth, but that is no valid argument in favor of a system whereby those who are in a position of superiority impose their will arbitrarily on others. On the contrary, such men have a greater share in the common responsibility to help others to reach perfection by their mutual efforts.
Source: Pacem in Terris (Vatican.va)