How is "altruistic behavior" defined?

Altruistic behavior is defined as self-sacrificing actions for others' benefit. This concept is rooted in behavioral ecology and evolutionary psychology, where certain behaviors are understood as contributing to the survival or reproductive success of others, often at a cost to the individual performing the act. Altruism can manifest in numerous ways, such as sharing food, providing help during difficult times, or engaging in cooperative behaviors that enhance group survival.

The essence of altruism lies in the motivation to support or benefit others, even when it may not provide immediate benefits to the altruist. This can create stronger social bonds within a group and potentially enhance the overall fitness of individuals related to the altruist, a concept often analyzed in the context of kin selection in evolutionary theory. Thus, the defining characteristic of altruistic behavior is that it prioritizes the well-being of others, often at a personal disadvantage.