Peter Singer

As long as we continue to study and cite Hobbes, Rousseau, and Marx—none of whose views of human nature can today be ranked as scientific—it would be perversely backward-looking to refuse even to consider sociobiology and what follows from it.

Peter Singer, ‘Ethics and Sociobiology’, Philosophy & Public Affairs, vol. 11, no. 1 (Winter, 1982), pp. 40-64