It seems that problems with drugs and alcohol have been a part of society for decades—which is, in fact, the truth. Even before the days of Prohibition in the 1920s, our culture has recognized that there are inherent dangers in the misuse of alcohol and drugs. But the drugs that seem the most problematic—or popular—can vary from decade to decade. What is driving individuals in Irvine, Calif. and across the nation to drug rehab centers now is not necessarily what took them there 30 years ago. The following infographic takes a look at what substances were most popularly misused in different decades.