Reciprocal altruismIn evolutionary biology, reciprocal altruism is a behaviour whereby an organism acts in a manner that temporarily reduces its fitness while increasing another organism's fitness, with the expectation that the other organism will act in a similar manner at a later time. The concept was initially developed by Robert Trivers to explain the evolution of cooperation as instances of mutually altruistic acts. The concept is close to the strategy of "tit for tat" used in game theory.
Nordic modelThe Nordic model comprises the economic and social policies as well as typical cultural practices common in the Nordic countries (Denmark, Finland, Iceland, Norway, and Sweden). This includes a comprehensive welfare state and multi-level collective bargaining based on the economic foundations of social corporatism, and a commitment to private ownership within a market-based mixed economy — with Norway being a partial exception due to a large number of state-owned enterprises and state ownership in publicly listed firms.
SelfishnessSelfishness is being concerned excessively or exclusively, for oneself or one's own advantage, pleasure, or welfare, regardless of others. Selfishness is the opposite of altruism or selflessness; and has also been contrasted (as by C. S. Lewis) with self-centeredness. The implications of selfishness have inspired divergent views within religious, philosophical, psychological, economic, and evolutionary contexts.
