2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/207684We consider the physics motivations and perspectives for the study of spin phenomena at the future high energies accelerators. The possibilities to use the already operating machines are also discussed. It is emphasized that the present status of QCD spin studies necessarily requires a wide range of spin measurements44 pages with 8 figures available by request from authors, IHEP 93-39, LaTeXHigh Energy Physics - Phenomenologytext