Cultural diffusion is a term used to describe the spread of one culture’s language, ideas, or principles to other cultures, where it is then adopted and embraced. In the last century or two the English language has spread rapidly around the world and is now the second language of a large proportion of the global population.

Polytheism is a religion defined by the belief in more than one God. In the ancient world almost all religions were polytheistic—such as the Greek and Roman religions, Egyptian, Norse and so on; however, since the rise of Judaism, then Christianity and Islam, monotheistic religions (the belief in one God) now largely dominate.

A monotheistic religion is defined by the belief in only one God. Judaism, Christianity, and Islam are all monotheistic religions. As is Zoroastrianism, an ancient Iranian monotheistic religion and philosophy. Of these choices only Hinduism is polytheistic, having a large range and variety of Gods.