[In-group exclusivism has] killed more human beings and destroyed more cities and villages than all the epidemics, hurricanes, storms, floods, earthquakes, and volcanic eruptions taken together. It has brought upon mankind more suffering than any other catastrophe.
Pitirim SorokinLove is the supreme value around which all moral values can be integrated into one ethical system valid for the whole of humanity.
Pitirim SorokinAny Organized social group is always a stratified social body. There has not been and does not exist any permanent social group which is "flat" and in which all members are equal.
Pitirim Sorokin