Altruism Helping behavior 13 Conduct of life 5 Ethics 5 Evolution (Biology) 5 Interpersonal relations 5 Love 5 more ... Psychology 4 Cooperation 3 Egoism 3 Emotions 3 Moral and ethical aspects 3 Motivation (Psychology) 3 Psychological aspects 3 Religious aspects 3 Righteous Gentiles in the Holocaust 3 Altruistic behavior in animals 2 Behavior evolution 2 Charity 2 Cooperativeness 2 Courage 2 Ethics, Evolutionary 2 Evolutionary psychology 2 Humanitarianism 2 Jews 2 Medical ethics 2 Philosophy 2 Rescue 2 Social aspects 2 Social evolution 2 less ...