Developing presence of mind, whether through prayer or a religiously unaffiliated reflection process, appears to be very important to the human body.
Buettner focuses on the likelihood that religious services bring communities together to share their ideals and connect to each other, things that have plenty of scientific basis in stress relief and developing bonds of trust. He adds that the services need not be religious, providing an incentive for atheists and agnostics to attend a non-religious service like those held by ethical societies, humanist groups, Unitarian Universalist churches, and newer atheist churches and services.