Inclusivism, one of several approaches to understanding the relationship between religions, asserts that many different sets of beliefs are true. It stands in contrast to exclusivism, which asserts that only one way is true and all others are in error. It is a particular form of religious pluralism, though that term may also assert that all beliefs are equally valid within a believer's particular context.
Broadly speaking, there are two schools of Inclusivist thought:
Strands of both types of Inclusivist thought run through inclusivistic faiths.

Ancient Greece

the common tendency of ancient Greek writers to equate foreign divinities to members of their own pantheon. Herodotus, for example, refers to the ancient Egyptian gods Amon, Osiris and Ptah as "Zeus," "Dionysus" and "Hephaestus." This could be seen an example of inclusivism, as could syncretism.
Syncretism functionized as an essential feature of Ancient Greek religion. Later on, Hellenism, a consequence of Alexander the Great's belief that he was the son of a god, only to be reinforced upon personally consulting the Oracle of Zeus-Ammon at Siwa in Egypt, itself showed syncretist features, essentially blending Persian, Anatolian, Egyptian elements within Hellenic formulations. After the Hellenization of the Egyptian culture initiated by Ptolemy I Soter, Isis became known as "Queen of Heaven" and worshipped in many aspects and by many names besides that of Hera.

Bahá'í Faith

, the head of the Bahá'í Faith in the first half of the 20th century, states:


A standard passage cited in the debate over this question is found in Jesus' words in John 14:6: "No one comes to the Father except through me". If this is taken to mean that a person is saved only by conscious faith in Jesus, the verse appears to contradict Lewis' position. However, another reading is that Jesus is solely responsible for making salvation possible. In this reading there may be room for the position that some might come to the Father through this salvation not knowing its connection to Jesus.