Extreme altruism also known as costly altruism, extraordinary altruism, or heroic behaviours (shall be distinguished from heroism), refers to selfless acts directed to a stranger which significantly exceed the normal altruistic behaviours, often involving risks or great cost to the altruists themselves. Since acts of extreme altruism are often directed towards strangers, many commonly accepted models of simple altruism appear inadequate in explaining this phenomenon.
Extreme altruism also known as costly altruism, extraordinary altruism, or heroic behaviours (shall be distin!guished from heroism), refers to selfless acts directed to a stranger which significantly exceed the normal altruistic behaviours, often involving risks or great cost to the altruists themselves. Since acts of extreme altruism are often directed towards strangers, many commonly accepted models of simple altruism appear inadequate in explaining this phenomenon.