In the 20th century and in the 21st century, large masses of people have abandoned atheism in [[Communism|communist]] and formerly communist countries (see: [[Atheism and its retention rate in individuals#Abandonment of atheism in atheistic communist countries|Abandonment of atheism in atheistic communist countries]]).
=== Growth of Christianity graph ===
[[File:Growth of Christianity.png|thumbnail|center|400px|[[Growth of Christianity]] graph.<ref>[https://www.researchgate.net/figure/shows-the-growth-of-the-total-number-of-Christians-worldwide-25-At-first-glance-it-may_fig5_301560058 Total Christian population graph]</ref>]]