Nearly a quarter of the world’s population, about 1.9 billion people, now identify as religiously unaffiliated, according to the Pew Research Center's latest analysis. This group, called the “nones,” includes atheists, agnostics, and those who say “nothing in particular” about religion. Their share rose from 23.3% in 2010 to 24.2% in 2020. The “nones” grew both in number and percentage alongside Muslims, while other religious groups, especially Christians, declined in share. The study covers 201 countries and territories, representing 99.98% of the 2020 global population. Among the “nones,” 17% identify as atheist, 20% as agnostic, and 63% say “nothing in particular.” Most were raised in religion but now disaffiliate from institutions, with 90% rarely or never attending religious services. Not all reject spiritual belief; only 29% say there is no higher power. The unaffiliated population tends to be older and has fewer children, posing a demographic challenge. However, religious switching drives their growth: for every 3.2 people leaving religion, only 1 person joins. Christians saw the largest net losses due to switching, with many leaving Christianity for no religion. This shift led to drops in Christian majorities in countries like the United Kingdom, Australia, France, and Uruguay. At the same time, the number of countries with unaffiliated majorities rose from 7 to 10, including the Netherlands, Uruguay, and New Zealand. China has the largest unaffiliated population, about 1.3 billion people or 90% of its population. The United States follows with 101 million, up 97% from 2010, making up 30% of Americans. Japan has 73 million unaffiliated, 57% of its population. These three countries alone hold a large share of the global “nones.” Globally, Christians remain the largest religious group at 2.3 billion people but their share dropped to 28.8%. Muslims increased by 347 million, now 25.6% of the world population. The religiously unaffiliated’s rise is mainly due to people leaving religion, reshaping global religious landscapes in many countries.