Traditionally, public opinion has changed slowly on big issues in the United States. But the last decade (2010 - 2019) was different. On three important issues, public opinion changed very quickly. Those areas are same-sex marriage, marijuana legalization, and religion.
Here's what the Gallup poll says about these changes:
Same-Sex Marriage: When the decade began, only a handful of states had legalized gay marriage and most Americans opposed it. But in 2011, Gallup recorded majority support for same-sex marriage for the first time. Americans continued to warm to gay marriage as the decade progressed, with support reaching the 60% mark just before the Supreme Court's 2015 Obergefell v. Hodges decision made gay marriage legal nationwide. In the final years of the decade, support has ranged between 61% and 67%. The wholesale change in public attitudes about gay marriage over such a short time span represents one of Gallup's most compelling public opinion trends. Marijuana: Much like the issue of same-sex marriage, Americans' views on legalizing marijuana have vastly changed, with the sharpest shift in support for legalization occurring in the past 10 years. In 2010, when no states had yet legalized recreational marijuana, 46% of U.S. adults supported legalizing it, but that grew to about two-thirds in four consecutive readingsby decade's end. Today, 11 states and Washington, D.C., have legalized recreational use of marijuana, while many other states have decriminalized it or passed laws allowing for medical marijuana use. Religion: Religious faith is prominent in the U.S., but much less so than in previous decades. Church membership and attendance -- as well as frequency of attendance -- are all down to record lows. Americans have become less likely to believe in God. Meanwhile, more than one in five Americans (21%) now describe themselves as having no religion, a sizable jump from 14% in 2010 and 8% in 1999. In addition to the decline in Americans identifying with any religion, some of the largest changes within religious groups have occurred among U.S. Catholics, of whom weekly church attendance has nearly halved since the beginning of the millennium, and whose confidence in organized religion and the clergy have fallen.
