But it is not love and not even sympathy upon which Society is based in mankind. It is the conscience — be it only at the stage of an instinct — of human solidarity. It is the unconscious recognition of the force that is borrowed by each person from the practice of mutual aid; of the close dependency of every one’s happiness upon the happiness of all; and of the sense of justice, or equity, which brings the individual to consider the rights of every other individual as equal to his own.