What concept involves concern for the well-being of others?

The concept that involves concern for the well-being of others is altruism. Altruism refers to selfless behavior that benefits another individual at a cost to oneself. It is the practice of placing the needs and interests of others above one's own, often manifesting in acts of kindness, generosity, and empathy without expecting any reward in return.

In the context of social and biological discussions, altruism is significant because it can enhance the survival and reproductive success of a group, establishing cooperative behaviors that are beneficial for social species. This differs from other options such as egotism, which involves prioritizing one's own interests and welfare above others'. Utilitarianism focuses on actions that promote the greatest good for the greatest number, but it's primarily a philosophical framework for decision-making rather than an expression of concern for others. Reciprocity involves mutual exchanges of benefits, which can create cooperative relationships but doesn't inherently involve selfless concern for others' wellbeing.