Religious toleration may signify "no more than forbearance and the permission given by the adherents of a dominant religion for other religions to exist, even though the latter are looked on with disapproval as inferior, mistaken, or harmful". Historically, most incidents and writings pertaining to toleration involve the status of minority and dissenting viewpoints in relation to a dominant state religion. However, religion is also sociological, and the practice of toleration has always had a political aspect as well.
An overview of the history of toleration and different cultures in which toleration has been practiced, and the ways in which such a paradoxical concept has developed into a guiding one, illuminates its contemporary use as political, social, religious, and ethnic, applying to LGBT individuals and other minorities, and other connected concepts such as human rights.
Religious toleration has been described as a "remarkable feature" of the Achaemenid Empire of Persia. Cyrus the Great assisted in the restoration of the sacred places of various cities. In the Old Testament, Cyrus was said to have released the Jews from the Babylonian captivity in 539–530 BCE, and permitted their return to their homeland.
The Hellenistic city of Alexandria, founded 331 BCE, contained a large Jewish community which lived in peace with equivalently sized Greek and Egyptian populations. According to Michael Walzer, the city provided "a useful example of what we might think of as the imperial version of multiculturalism."
Before Christianity became the state church of the Roman Empire, it encouraged conquered peoples to continue worshipping their own gods. "An important part of Roman propaganda was its invitation to the gods of conquered territories to enjoy the benefits of worship within the imperium." Christians were singled out for persecution because of their own rejection of Roman pantheism and refusal to honor the emperor as a god.