for many hundreds of years, the roman catholic church has regarded itself as the only christian church and has called itself the "catholic" (or "universal") church. in other words, only those people who were within the "organisation" of the roman catholic church were believed to belong to the "universal church". in the 20th century this view began to change and in the late 20th century there was a strong movement within parts of the roman catholic church to reach out to other denominations. the eastern orthodox church has thought of itself in the same way, but in the late 20th century there has been much more discussion between the orthodox church and roman catholic, lutheran and anglican churches. some smaller denominations such as jehovah's witnesses also believe that they are the one and only true christian church.