Are the image of humanity and the social project of the Left still relevant today - an ideal that everyone should strive for and that should serve as a model for education? Peter Singer passionately advocates for a modern, flexible understanding of humanity that is oriented towards evolutionary possibilities. The Left must understand humans as developing beings, shaped not only by selfishness and competition but also by (well-understood) altruism and empathy. It must actively support these qualities - only then can it be accepted again as a champion of solidarity, cooperation, and justice. A plea at the right time.