What Lead to the Fall of the Roman Empire - Brief Summary

What were some of the main factors that led to the fall of the Roman Empire?
Perhaps the two main and key factors that led to the fall of the Roman Empire would be the disunity of it's people towards the end and lack of great leadership. Though the rise and fall of the Roman Empire (750 B.C. - 476 A.D.) it had many rulers. Of which there were some good and some bad. There were emperors that were known to be great philosophers, writers, poets, as well as great military strategists. …