When the early church underwent a schism, does that mean it changed its most important doctrines?

That is when the early church experienced a schism it doesn't mean that it changed its more important doctrines, it means that it was a division of the church.

Explanation:

john maynard keynes developed new economic theories in response to the stock market crash of 1929. great depression of the 1930s. first and second world wars. economic boom of the 1950s.