Constantine called for the Council of Nicaea to settle the disagreements within Christianity (specifically between Arius and Alexander). While Alexander is not the most devout Christian, he knew that Christianity was a unifying force for his empire. However, it could not be a unifying force without unity in the religion itself. Constantine was primarily focused on a unified outcome as opposed to the internal processes, so he was not constantly present at the Council. His actions served as a turning point for the spread of Christianity.