Final answer:
Between the late 1960s and late 1970s, illicit drug use in the U.S. increased. The War on Drugs led to increased incarcerations and strict policies. Views on marijuana relaxed over time, with a majority favoring legalization by 2013.
Step-by-step explanation:
Between the late 1960s and the late 1970s, illicit drug use in the U.S. increased. This period was marked by a cultural shift, with attitudes toward substances like marijuana changing, often as a symbol of rebellion against traditional values. However, by the 1980s, this trend led to a political and social backlash as the U.S. government began the War on Drugs, which resulted in a significant increase in incarceration rates and the implementation of policies such as the "three strikes laws". Despite these rigid stances, views toward marijuana began to soften again in more recent years, demonstrated by the fact that in 2013, for the first time, a majority in the U.S. favored legalizing marijuana, reflecting a shift from previous decades where it was widely considered a dangerous substance.