Why is it important that congress have the power to regulate interstate commerce

implied powers are necessary to carry out expressed powers. Why has the power to regulate interstate commerce become such an important power of Congress? The definition of interstate commerce has expanded to give Congress authority over virtually everything that crosses state lines.

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.