Complex sentence: Lombroso, however, did not allow any critiscism by rival scientists and his alleged scientific supremacy and unleashed a smear campaign and scientifc crusade against Colajanni while blocking access to academic journals to prevent Colajanni's replies.
Split into simpler sentences: Lombroso, however, did not allow any critiscism by rival scientists and his alleged scientific supremacy. He unleashed a smear campaign and scientifc crusade against Colajanni while blocking access to academic journals to prevent Colajanni's replies.