A Historical Discussion of Economics: Why do economists disagree?

Why do economists disagree? Economists disagree because they are bounded by different research methodologies and certain methodological simplifications; simplifications which we can first see in the writings of classical economists. It is the aim of this writing to argue that the methodological simplifications, which we find in the writings of classical economists, are still a source of controversy, as many contemporary economists still research in accordance with generic simplifications, while other academics have progressed. This is why economists disagree with each other.