The suicide of Tyler Clementi, a Rutgers University freshman who jumped from the George Washington Bridge last year after discovering that his roommate had secretly streamed his romantic interlude with another man on the Internet, captured worldwide attention. In the wake of his death, stories of gay youths being bullied and taking their own lives proliferated.

The subsequent outpouring of concern from parents, educators and those who had survived bullying themselves inspired It Gets Better, a campaign led by the columnist and author Dan Savage in which thousands of lesbian and gay adults shared their stories to assure all teenagers that society has a place for them.

Popular culture has reinforced this message of acceptance. For example, the hit TV show “Glee” has had three storylines involving gay teenagers this season, including the matter-of-fact courtship, with rare onscreen same-sex kissing, of characters played by Chris Colfer and Darren Criss. Lady Gaga has countered the antigay rhetoric that many young people hear in their churches and communities with the song “Born This Way,” increasing her already large fan base among gay and lesbian teenagers.

“The amount of attention that has been given to debates over L.G.B.T. issues in the last year is another sign of how deeply American society remains divided over L.G.B.T. issues,” said George Chauncey, a Yale University professor of 20th-century United States history and lesbian and gay history, referring to lesbians, gay men and bisexual and transgender people. “And it has made it clear to young people just how much opposition remains.”