sentences:  In 1952 Parsons died at the age of 37 in a home laboratory explosion that attracted national media attention; the police ruled it an accident, but many associates suspected suicide or murder.Parsons's occult and libertarian writings were published posthumously, with Western esoteric and countercultural circles citing him as one of the most significant figures in propagating Thelema across North America.Although academic interest in his scientific career was negligible, historians came to recognize Parsons's contributions to rocket engineering.