Original sentence: The colony was built to examine Alexander's hypothesis that drug addiction is a myth and that continued drug use, particularly the use of heroin, is largely, and perhaps entirely, the product of unhappiness, and not physiological compulsion
Edited sentence: The colony was built to examine Alexander's hypothesis that drug addiction is a myth and that continued drug abuse, particularly the abuse of heroin, is largely, and perhaps entirely, the product of unhappiness, and not physiological compulsion