The issue of human nature is very complex and elusive, and mankind has been trying to unveil its elements since the beginnings of any philosophical reasoning. Whether they were questions of ontology, gnoseology, or ethics, it has been an uneasy task to uncover the complexity of the term. This article concentrates on finding ideas that support the existence of human nature and consequently searches for its possible ethical implications. I focused on the traditional issues of good vs evil, especially in (...) terms of dichotomy between committing violent acts and waging wars in contradiction to creation of conditions for peaceful and just societies. In the article, I compare various ideas on human nature and analyse their potential in unveiling its ethical implications. I also comment on the possibility of war and peace being consequences of human nature and its connection to our disposition of being moral subjects. (shrink)