Complex sentence: Lysenko's political success was due in part to his striking differences from most biologists at the time, him being both from a peasant family as well as an enthusiastic advocate of the Soviet Union and Leninism.
Split into simpler sentences: Lysenko's political success was due in part to his striking differences from most biologists at the time. He was from a peasant family and an enthusiastic advocate of the Soviet Union and Leninism.