Because u can travel better
Judicial Review is the ability to review new laws to see if they are within the guideline of the Constitution. If the law is not within the guidelines, it is called unconstitutional and is discarded.
Alexander the Great didn't conquer Italy. Neither did he conquer China.
Alexander the Great was the leader of the hellenistic period in Greece and contributed to the creation of one of the greatest empires at the time which was spanning all around from the Greek peninsula all the way to Mesopotamia.
Superior manpower, industry, access to trade, finances, leadership, and more.