The article in Politico suggests a couple of possible reasons for the celebrity involvement in the 2012 election like for one Barack Obama's star power and liberal appeal plus because of the social media boom which makes the communication much, much easier. Finally this kind of communication with the stars also works well.
<em>The factors that caused Rome to plunge into civil wars and weakened the Republic were:
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<u>Power and control</u>. Powerful Roman families desired to gain control at any cost. Assassinations were the order of the day. There were some Roman Emperors that lasted very few ruling the Empire. It debilitated the social structure of Rome.
<u>Ambition</u>. The Roman Empire was so ambitious. Its hunger for more territories made them always be involved in conquering wars. The Empire expansion reached so far Rome that in those far away places the Empire could not sustain its armies and their presence.
<u>Egotism</u>. Roman soldiers were more loyal to their commanders than the same Empire. This means that loyalty was to the person, the leader, more than Rome. Battles among troops started and this debilitated the Roma army.
<u>Killing</u>. Those differences and political control generated wars among the Romans and many people were killed.
<u>Patricians land</u>. There was a Land legislation to take land from the Patricians to give it to the Military men after sixteen years of service in the Roman Army. This was one of the reasons for the civil war.
Answer:
The Europeans brought with them diseases such as measles and smallpox against which the American tribes had no natural immunity. They spread like wildfire, killing rulers of both the Aztecs and Incas, along with millions of other people.