Skwim
Veteran Member
"In the U.S., Christians will decline, from more than three-quarters of the population (78.3 percent) in 2010 to two-thirds (66.4 percent) in 2050. Religious “churn” — people leaving their childhood faith for a different faith or none at all — is the primary driver of change.
The Muslim share of the U.S. population is projected to climb to 2.1 percent, up from less than 1 percent today. Jews will fall from 1.8 percent to 1.4 percent.
In 2010, there were 159 countries with a Christian majority, but that will fall by eight countries, including France, the United Kingdom, Australia and New Zealand. By 2050, Muslims will hold the majority in 51 countries, up by two from 2010, including Nigeria, which just elected a Muslim president, and the Republic of Macedonia.
source
Looks like Islam is the leading band wagon here.