This monograph offers an analytical exploration of Neo-Humboldtian linguistics, a key movement in modern German and European linguistic thought. It examines the core principles of Neo-Humboldtian philosophy, sociology, and psychology of language, with a focus on the works of Johann Leo Weisgerber and his followers, where these ideas are most extensively developed. The book is designed for scholars and professionals in the fields of General Linguistics, Philology, and Philosophy.The monograph is added to the Library of Congress collection (LCCN 2023526476).