Pitirim Sorokin quotes:

[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.

Love is the supreme value around which all moral values can be integrated into one ethical system valid for the whole of humanity.

Only the power of unbounded love practiced in regard to all human beings can defeat the forces of interhuman strife, and can prevent the pending extermination of man by man on this planet. Without love, no armament, no war, no diplomatic machinations, no coercive police force, no school education, no economic or political measures, not even hydrogen bombs can prevent the pending catastrophe.

Are there quantitative aspects to the phenomena of war that can be counted? Evidently!

Either the conscious intellect is impotent, or is not sufficiently strong, or is not the factor positively connected with altruistic phenomenon generally or their sublime form particularly.

Any 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.

Man is a conscious, rational thinker and a supra-conscious creator genius.

The most effective and most accessible way to acquire the maximum of constructive power is to love truly and wisely.

The resort to human flesh, often after months of ever-increasing hunger pangs, appeared to be an animallike reaction without painful emotional overtones.

Hate begets hate, violence engenders violence, hypocrisy is answered by hypocrisy, war generates war, and love creates love.