Assertion: altruism | /r/HasProperty | favoured
Facets:
Source sentences:
text: This theory is encapsulated in a pleasingly simple form by Hamilton's rule that altruism is favoured when rb–c>0; where c is the fitness cost to the altruist, b is the fitness benefit to the recipient and
text: This predicts that altruism is favoured when r or b are higher and c lower.
text: A behaviour is only altruistic if it leads to a decrease in direct fitness, so altruism can only be favoured when an indirect benefit outweighs this direct cost, as shown by Hamilton's rule.