Two dramatic trends that for years have defined the shifting landscape of religion in America — a shrinking white Christian majority, alongside the rise of religiously unaffiliated Americans — have stabilized, according to a new, massive survey of American religious practice. What was once a supermajority of white Christians — more than 80% of Americans identified as such in 1976, and two-thirds in 1996 — has now plateaued at about 44%, according to the new survey, which was conducted by the nonpartisan Public Religion Research Institute. That number first dipped below 50% in 2012. They have largely been replaced by Americans who do not list any religious affiliation, a group that has tripled in proportion since the 1990s. Today, the unaffiliated make up roughly a quarter of Americans. Young adults are most likely to identify this way, with more than a third saying they are atheist, agnostic or otherwise secular, the study found.