Non-believers are often more educated, more tolerant and know more about God than the pious […] Secularists make up some 15 percent of the global population, or about 1 billion people. As a group, this puts them third in size behind Christians (2.3 billion) and Muslims (1.6 billion). Churches in the US are losing up to 1 million members every year. In Europe, secularization has advanced even further.