I've recently met a wonderful worldbuilder and redditor over on /r/worldbuilding, known simply as FaerFoxx. He's produced (and continues to produce) extremely high quality guides on several worldbuilding topics, including exospheric life, taxonomic hierarchies, blood chemistry, and our subject today, religion.
Religion has always been one of my favorite subjects to write about, since there's so much potential for depth in beliefs, that can branch off and touch on all subjects and regions of a constructed universe. FaerFoxx describes the ins and outs of religion and its nature, usage, and most of all, its importance.
FaerFoxx's Overview on Creating Religions
A Religion is a belief system concerning the cause, nature, and purpose of the universe, especially when they have a commitment to a superhuman agency based upon faith, have common practices or rituals, and have a moral code or