The last financial crisis combined with some recent social trends (like growing inequality or environmental problems) inspired many contemporary economists to the re-evaluation of actual economic knowledge in the search for solutions to these problems. Modern economic schools (especially heterodox ones) stress the meaning of ethical issues in economics more often. The thesis of the paper is that this revival of the ethical face of present economics depends very strongly on the changing assumptions of human nature within economics and other disciplines which work alongside economics, such as social psychology or business ethics, for instance. In order to prove the thesis, the paper provides an evaluation of current economic schools, e...