Peter Belohlavek (born April 13, 1944 in Zilina, Slovakia) is the author of The Unicist Ontology of Evolution and the creator of the unicist approach. He is the founder of The Unicist Research Institute and the Unicist Goodwill Network.He developed the unicist ontological approach to complexity science to research and manage human complex adaptive systems and the unicist methodology for the research of complex systems. The framework of his complexity science research methodology is based on pragmatism, structuralism and functionalism. His models were applied to diagnoses, strategies, organization and future research in the social, institutional and individual fields.The four basic pillars of his research were the ontogenesis of evolution, the anthropological invariables and their evolution, the ontointelligence, and the double dialectical behavior.