[2] Writing played a major role in standardizing religious texts regardless of time or location and making easier the memorization of prayers and divine rules.
The Religionsgeschichtliche Schule emerged at a time when scholarly study of the Bible and of church history flourished in Germany and elsewhere (see higher criticism, also called the historical-critical method).
In order to better understand the origin and current diversity of religious belief systems throughout the world, recent studies have attempted to focus on historical interrelationships and diversification of all major organized religions, applying modern evolutionary philosophy to the comparative analysis of putative ideological groups.
Examples of Upper Paleolithic remains that some associate with religious beliefs include the lion man, the Venus figurines, and the elaborate ritual burial from Sungir.
Early theorists, such as Edward Burnett Tylor (1832–1917) and Herbert Spencer (1820–1903), emphasized the concept of animism, while archaeologist John Lubbock (1834–1913) used the term "fetishism".
The site, near the home place of original wild wheat, was built before the so-called Neolithic Revolution, i.e., the beginning of agriculture and animal husbandry around 9000 BCE.
Surviving early copies of religious texts include: Some historians have labelled the period from 900 to 200 BCE as the "axial age", a term coined by German-Swiss philosopher Karl Jaspers (1883–1969).
Intellectual historian Peter Watson has summarized this period as the foundation time of many of humanity's most influential philosophical traditions, including monotheism in Persia and Canaan, Platonism in Greece, Buddhism and Jainism in India, and Confucianism and Taoism in China.
The invention of the printing press in the 15th century played a major role in the rapid spread of the Protestant Reformation under leaders such as Martin Luther (1483–1546) and John Calvin (1509–1564).