Discuss the origin and development of macro economics

Macroeconomics rose from two different factors that are known as theories. The business cycle theory and the monetary theory, which was believed that different monetary factors couldn't and may not affect real factors, such as outputs, yet several theories has passed, different economists proposed and explained numerous theories, yet some leads to unanswerable holes, until theories and different factors were combined to create a formal consensus that every one has agreed upon and later on, several new growth theories rose for the betterment of the economy in the long-run.