After World War II 1945, soldiers returned home, world population exploded (baby booming)! Children born in this period inherit peace and especially in America, their lives are significantly enhanced due to the development of science and technology. The birth of a series of disc players, recording techniques…. music started to explode, especially the Rock genre.
By the 1960s, the baby boomers became students, teenagers and wanted to express themselves (according to statistics, at this stage, the average age of the American people is only 29). Documents suggest that the origin of the hippie movement was music. But Hippie thrived in the mid-late 1960s and gradually spread into the early 1970s.