Also, in post-war years, Harkin's philosophy again adapted to the context in which he felt national parks were most needed. For many at the time, life consisted of long hours of laborious work in factories and living in big cities, which according to Harkin brought out the animal in man and deteriorated both the body and mind of the modern Canadian subject. But a feasible way to counteract these oppressive effects, Harkin wrote, was through the almost mystical rejuvenation that national park lands offered on a physical, mental, and even moral level. Despite appearing so though, Harkin's philosophy was not a critique of industrial life and urbanism. Rather, it was his belief that national parks were a way for civilization and economic growth in Canada to continue "with the worker escaping periodically to nature to be recharged" but with every intention of returning as a productive member of society.