It is interesting that throughout the human civilizations, the history always repeats itself. Many similarities can be found between the two most powerful civilizations in human history—the ancient Roman Empire and the present day United States. They have both once experienced the great expansion in economy and military, and established a strong government and expanded their influence all over the world. The Roman Empire, once the super power in ancient times, finally failed in 476 AD due to the Germanic invasion. The United State began to show signs of decline from the last decades. It is possible that the US may repeat the decline and fall of the Roman empire, since several major reasons that led to the fall of the Roman Empire has been found in the present day US.