In the 1960s, which illicit drug was most widely used?

• A. LSD
• B. Cocaine
• C. Heroin
• D. Marijuana

Answer: (D)

During the 1960s, cannabis became the drug most widely used because it was affordable, relatively easy to obtain, and carried less social stigma in many circles. Its use spread rapidly through college campuses and youth counterculture, reaching a broad cross-section of people—not just a specific subculture or urban scene. This accessibility and social normalization meant a larger number of individuals experimented with or regularly used marijuana compared with other illicit drugs at the time.

LSD, while iconic and influential in fashioning the era’s psychedelic culture, tended to be concentrated among certain groups and settings, such as clubs and university circles, so its overall user base was smaller. Heroin and cocaine were more costly, carried greater health risks, and in many places were less accessible, which kept their widespread use lower than that of marijuana. All of this helps explain why marijuana stood out as the most widely used illegal drug during the decade.