altruism, the selfless concern for the welfare of others
enlightened self-interest, a philosophy in ethics which states that persons who act to further the interests of others (or the interests of the group or groups to which they belong), ultimately serve their own self-interest.
Homo economicus, portrayal of humans as agents who are consistently rational, narrowly self-interested, and who pursue their subjectively-defined ends optimally.
Individualism, a focus on the individual as opposed to society