Complex sentence: Robert S. de Ropp (1913-1987) was an academic in bio-chemistry, who became a prominent author in the general fields of the realization of human potential, and the search for spiritual enlightenment.
Split into simpler sentences: Robert S. de Ropp (1913-1987) biochemist and a researcher and academic in that field. He became a prominent author in the general fields of the realization of human potential and the search for spiritual enlightenment.