al·tru·ism /ˈalˌtro͞oˌizəm/ n.
the belief in or practice of disinterested and selfless concern for the well-being of others

e·go·ism /ˈēɡəˌwiz(ə)m,ˈēɡōˌiz(ə)m/ n
an ethical theory that treats self-interest as the foundation of morality.