ABSTRACT
Humans have a variety of biosocial constraints to killing other humans, both individually and collectively. There are natural, internal inhibitions as well as moral and ethical restraints. But, tragically, mankind is the only species that kills its own kind with such abandon. War and mass killings are examples where these constraints are overridden through various techniques such as training, propaganda, ideology, and indoctrination as well as compelling contexts like social inequalities, grievances, perceived threat, paranoia, territoriality, overcrowding, defence, authoritarian ambitious leadership, and anticipated spoils and benefits. This chapter provides a better understanding of these complex factors and a willingness to address these issues to bring in a more peaceful change.
