Emperor Caracalla (who gave citizenship to the Barbarians which lead to the downfall of Rome)
It’s not so much that history repeats but that human nature doesn’t change.
Constitutio Antoniniana
The Constitutio Antoniniana (Latin: “Constitution [or Edict] of Antoninus”) (also called the Edict of Caracalla or the Antonine Constitution) was an edict issued in 212,[1] by the Roman Emperor Caracalla declaring that all free men in the Roman Empire were to be given theoretical Roman citizenship and that all free women in the Empire were to be given the same rights as Roman women.
According to Cassius Dio, the only Roman historian to talk about this edict, and with only one sentence, the reasons Caracalla passed this law were mainly to increase the number of people available to tax. In the words of Cassius Dio: “This was the reason why he made all the people in his empire Roman citizens; nominally he was honouring them, but his real purpose was to increase his revenues by this means, inasmuch as aliens did not have to pay most of these taxes.”[2] It should, however, be noted that Cassius Dio generally saw Caracalla as a bad, contemptible emperor.
http://en.wikipedia.org/wiki/Constitutio_Antoniniana