Humans are obsessed with categorization. We divide the people and things of the world into millions of groups and give them names, characteristics and stereotypes. Ethnicity, sexuality, religion, political views, gender and species: all reflect the constant human need to notice, name and categorize. Still not convinced? Look at a dictionary. The very fact that it was created demonstrates a tendency of the human mind to solidify things, their category, their characteristics and their definition. Most brains don't do well with abstract nouns. how love, justice, equity and peace rebound and cannot be tamed by one definition. But this doesn't stop humans. Our constant need to classify and define still raises the incessant question: what is peace? Dinka Corkalo, associate professor of psychology at the University of Zagreb in Croatia, writes about peace education, its history and its relevance to related fields of education such as psychology, sociology and philosophy. In his book Peace Education, he states that peace is broken down into teachable components and identifies these components in order to introduce peace as a subject of education. According to Corkalo, there are two categories of peace: negative and positive. Negative peace exists in the absence of actual violence, large-scale conflict and war, while “positive peace implies the development of a society in which, except for the absence of direct violence, there is no violence structural or social injustice” (Corkalo). He believes that working proactively towards positive peace is the key to preventing conflict. Corkalo argues that the study of peace and its psychological, political and sociological origins will provide a more effective tool, ... middle of paper ..... .tassen.” February 1, 2010. Basic information about the author. "Kent Kille". February 1, 2010. Basic information about the author. Kille, Kent J. “In Pursuit of Peace.” Ethics and International Affairs 23.4 (2009): 409+. General A file. Network. January 29, 2010. Kille addresses two authors' assessments of an effective peace strategy in order to provide two perspectives on the neglected area of ​​study. "Psychology in Bosnia and Herzegovina, Croatia and Serbia". February 1, 2010. Basic information about the author. Stassen, Glen. “Peace: a history of movements and ideas”. The Christian Century 126.25 (2009): 44+. General A file. Network. February 1, 2010. Stassen argues in favor of Cortwright's claims for a peace strategy rather than a military peace strategy, in order to convince the reader to practice "right peacemaking".”