An international overview of the state of our contemporary knowledge in sociocultural psychology - as a discipline located at the crossroads between the natural and social sciences and the humanities. Since the 1980s, the field of psychology has encountered the growth of a new discipline - cultural psychology - that has built new connections between psychology, sociology, anthropology, history and semiotics. The handbook integrates contributions of sociocultural specialists from fifteen countries, all tied together by the unifying focus on the role of sign systems in human relations with the environment. It emphasizes theoretical and methodological discussions on the cultural nature of human psychological phenomena, moving on to show how meaning is a natural feature of action and how it eventually produces conventional symbols for communication. Such symbols shape individual experiences and create the conditions for consciousness and the self to emerge; turn social norms into ethics; and set history into motion.