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Dungeons & Dragons is a structured yet open-ended role-playing game. [24] Typically, one player takes on the role of Dungeon Master (DM) or Game Master (GM) while the others each control a single character, representing an individual in a fictional setting. [24]
Altruism is defined by some evolutionary biologists (e.g., R. Alexander, 1987; W. D. Hamilton, 1964) as behavior that is beneficial to others (or to the group) at a cost to the individual, and many posit individual selection as the mechanism that explains altruism solely in terms of the behaviors of individual organisms acting in their own self ...