Became a policy of <span>nationalism.</span>
A reed stylus was the main writing tool used by Mesopotamian scribes. Scribes created the wedge shapes which made cuneiform signs by pressing the stylus into a clay or wax surface.
Monroe doctrine was the thing that blocked other nations from coming into americas. It was enforced by the british military who were the strongest at time.
Many nations accepted this out of fear of their military.