"The love for all living creatures is the most noble attribute of man."
"In however complex a manner this feeling may have originated, as it is one of high importance to all those animals which aid and defend one another, it will have been increased through natural selection; for those communities, which included the greatest number of the most sympathetic members, would flourish best, and rear the greatest number of offspring."
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Source: Charles Darwin (1875). “The Descent of Man, and Selection in Relation to Sex”, p.107
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