The Pew Research Center survey, conducted in association with A+E Networks' HISTORY, asked everyone from Millennials to members of the Greatest Generation to list the events that most profoundly affected America.
Three-quarters of Americans say Sept. 11 was one of the 10 events in their lives that had the greatest impact on the country, with many also citing Obama's election and the tech revolution.
Today, 57% of U.S. adults say use of marijuana should be made legal, while 37% say it should be illegal. A decade ago, opinion was nearly the reverse.
Recent presidential elections have been dominated by voters from the Baby Boom and previous generations. That may change this November.
Compared with many other countries in the world, Americans stand out for their patriotism. But surveys show that Americans disagree over what’s behind their country’s success.
Since 2010, Millennials' rating of churches and other religious organizations has dipped 18 percentage points. Their views of the national news media also have grown more negative.