Collection of articles dedicated to the 77th anniversary of Lev Samoilovich Klein. The collection of scientific works in honor of the outstanding Russian archaeologist Professor Lev Samoilovich Klein contains research by scientists - representatives of leading scientific centers in Russia, Denmark, Sweden, Poland, Great Britain, Canada, Australia, the USA and Moldova. The topics of the articles reflect the main directions of a wide range of scientific interests of L. S. Klein, including the theory of logical science, controversial issues of archeology of the Bronze Age of Eurasia, socio-cultural and ethnological problems. Along with generalizing theoretical and methodological works, the collection presents new scientific concepts and introduces materials of fundamental importance for solving specific problems of modern archeology.