Human beings typically engage in prosocial, altruistic behavior. according to your text, why do we engage in this behavior?

well, i can't read it so i'll ask you questions about it : )

if you were a reader and you read the introduction, would you want to read more?

does it start with a question? if so, is it something you would want to read about?

and ask any friends or family for their opinion : )

stable food supply,social structure, government,religion,culture/art,technology and writing/language;