While this was certainly several nails in the coffin of the Roman Republic, the doom of the Republic actually started before then. The fate of Rome was actually sealed when they became the undisputed masters of the Med. This brought an ever increasing wealth into the society, and as could be easily predicted, ambitious men vied for control of that wealth, in the process stripping all safeguards which had been put into place to counter the machinations of ambitious men.
Net result? Read any history book...
the infowarrior
Hmmm... yes and the Republic never put sufficient checks on how one could use that wealth. Also, as the Social War showed, it didn’t continue with the spread of citizenship