Jesus wept.

This is a study from 2016 on the socio-economic contribution of religion to US society, published in the Interdisciplinary Journal of Research on Religion. Its baseline estimate, based on revenue of faith-based institutions alone, is greater than the combined revenue of Apple and Microsoft. Its upper-end estimate (making some implausible assumptions about ways faith affects how people live their lives) accounts for around a third of the US economy. The mid-range estimate, that the authors reckon is likely to be the most accurate, suggests its value to US society is well over a trillion dollars, making it equivalent to the 15th largest economy in the world.

Holy shit.