https://www.pewresearch.org/fact-tank/2015/11/10/most-americans-believe-in-heaven-and-hell/

Nones and the afterlife: RNS https://religionnews.com/2016/07/15/why-do-many-nones-believe-in-life-after-death/

Patheos non-religious blog US no longer exceptional https://www.patheos.com/blogs/tippling/2019/04/29/religion-in-the-us-is-no-longer-exceptional-and-a-chat-about-the-afterlife/