The Ender's Game series (often referred to as the Ender saga and also the Enderverse) is a series of science fiction books written by American author Orson Scott Card.

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Some animals take care of others in need even if they are not related: Great apes, elephants and dolphins stand out for their altruistic, selfless behaviors

The Generosity Divide: How Political Views Shape Altruistic Behavior

A theory of attractiveness suggests beautiful people are seen positively and these views become internalized, motivating altruistic behavior. New research, however, finds support for the view that beautiful people feel entitled (due to their bargaining power in relationships) and behave selfishly.

Life and death of an 'altruistic' bacterium

Our Brains Reveal the Truth: Empathic and Altruistic or Cold and Individualistic