What does the "altruism" mean? In what circumstances could I use it?

Native speaker’s answer
Rebecca
"Altruism" is a moral principle and practice that values and has a concern for the well-being of animals and people. It's selflessness; continual concern and sacrifice for others. Here, Taylor's talking about how someone people say that she's a narcissist and just pretends to care about people. Ex: She showed true altruism. Se was ready to risk her own life to save others. Ex: His lack of altruism and care for anything living was terrifying.