The Republic has a tradition of allowing extreme powers in a time of war. The legislature has been lazy, partisan, and self interested. The people were sick of the legislature, and when the leader took power no one did anything to stop him, because the legislature was so corrupt. Sound like America? It was the Roman Republic before it became the Roman Empire. The leader who crossed the Rubicon both realistically and figuratively was Julius Caesar. The Legislature was the Roman Senate. History bites doesn't it?
from:
http://en.wikipedia.org/wiki/Roman_republic#History_of_the_Roman_Republic"The beginning of the end
Economic and Political strife in Rome
Rome's military and diplomatic successes around the Mediterranean resulted in unforeseen economic and political pressures on the state. While factional strife had always been part of Roman political life, the stakes were now far higher; a corrupt provincial governor could acquire unbelievable wealth; a successful military commander needed only the support of his legions to rule vast territories.
Starting with the Punic Wars, the Roman economy began to change, concentrating wealth in the hands of a few powerful clans and causing political tension within Rome.
Much of the newly conquered territories were seized by rich and powerful families. Additionally, as only men who could provide their own arms were eligible to serve in the Legions, the majority of Roman troops came from the middle class land holders who theoretically would be fighting to defend their own lands. With military campaigns now lasting years rather than just a few months, soldiers could not return to work their farms. With their holdings lying fallow, their families quickly fell into debt, and their lands were lost to debtors - typically wealthy landholders who consolidated these properties into vast latifundia. Formerly middle-class soldiers would return from years of campaigning to find themselves landless, unable to support their families, and ironically, unemployable because the successes of the Legions made slaves a much cheaper source of labor.
By 133 BC the economic imbalance was too acute to ignore, but the wealthy patricians and old families in the Senate had a vested interest in preserving the status quo. It seemed that a land reform through the traditional channels was an unlikely prospect."
"The key issue was whether or not Caesar would be able to stand for the consulship of 48 BC in absentia. Caesar's governorship's would expire at the end of 49 BC, and so would his immunity from trial. He was sure to be charged with violations of the constitution stemming from his consulship of 59 BC, which could result in his political and probably even physical, death. If he was allowed to run in absentia, he could immediately assume another consulship, and then following that, immediately assume a new governorship, always maintaining his immunity. The optimates were heavily opposed to Caesar's standing in absentia, and on the first of January, 49 BC, passed a law declaring Caesar a public enemy and demanded his return to Rome to stand trial. Pompey was given absolute authority to defend the Roman Republic. This news reached Caesar probably on January 10, and proclaiming "alea iacta est" - "the die is cast" (in fact, he said it in Greek, quoting Menander), Caesar crossed the Rubicon River (the boundary between Cisalpine Gaul and Italy) with his army. Civil war had begun again.
Caesar, leading a tough veteran army, quickly swept down the Italian peninsula, and encountered meager resistance from freshly recruited legions. The only exception was at Corfinium, where Gnaeus Domitius Ahenobarbus was defeated. Caesar pardoned him, under his notable policy of clemency — he wanted to let everyone know that he would not be the next Sulla. He took Rome without opposition, and then marched south to try and stop Pompey, who was trying to withdraw from Brundisium across the Adriatic Sea to Greece. Caesar came close, but Pompey and his armies were able to escape at the last minute.
In 48 BC Pompey controlled the seas, and his legions heavily outnumbered Caesar's; but the legions of Caesar, after ten years of vigorous campaigns, were experienced veterans. Caesar, for his lack of a navy, solidified his control over the western Mediterranean, notably at Massilia and in Spain. Then he invaded Greece. The two leaders first faced each other at the Battle of Dyrrhachium, where Pompey won a major victory. Nevertheless, Pompey failed to follow up on his victory, and Caesar was able to regroup and win a decisive victory at the Battle of Pharsalus on the 9th of August. Pompey fled to Egypt, where he hoped to find assistance.
Caesar pursuing Pompey, arrived in Alexandria, capital of Ptolemaic Egypt, to find the breadbasket of the Mediterranean in a state of civil war. Agents of the young king, Ptolemy XIII, had assassinated Pompey and presented his head to Caesar, believing it would please him and that he would support Ptolemy against his sister, Cleopatra. Caesar was too a cunning politician to make such a mistake. In a careful way he lamented the inglorious death of Pompey, a fellow roman, and supported the military weaker side, whose gratitude would logically be much greater. He even began an affair with Cleopatra. A long, drawn-out city battle resulted, one of the most dangerous of Caesar's career, but he triumphed and placed Cleopatra on the throne along with another brother, Ptolemy XIV. Cleopatra later gave birth to Caesar's son, Caesarion, titled Ptolemy Caesar. Caesar hearing of an invasion in Asia Minor led by Pharnaces II of Pontus, the son of the old Roman enemy Mithridates, advanced there in 47 BC, and won a quick victory at the Battle of Zela. It was then that Caesar famously said: "Veni, Vidi, Vici" - "I came, I saw, I conquered."
In 46 BC Caesar went to North Africa to deal with the regrouping remnants of the pro-Pompeian forces under Cato the Younger and Titus Labienus. After a slight setback in the Battle of Ruspina he defeated them at the Battle of Thapsus. Much to Caesar's chagrin, Cato committed suicide. Caesar had wanted to pardon Cato, his most intractable foe, in order to gain popularity through further clemency. In 45 BC, he went to Spain, and won the final victory over the pro-Pompeian forces in the terrifying Battle of Munda. He said that before, he always had fought for victory, but in Munda he had fought for his life. He then returned to Rome; he had less than a year to live.
In that final year Caesar launched many reforms. He tightly regulated the distribution of free grain, keeping those who could afford private grain from having access to the grain dole. He reformed the calendar, changing from a Lunar to a Solar calendar and giving his gens name to the 7th month (July). This calendar, with minor changes made by Octavian (who would later rename the 8th month (August) after one of his titles) and Pope Gregory in 1582, has survived until now. He also reformed the debt problem. At the same time, he continued to accept enormous honors from the Senate. He was named Pater Patriae - "Father of his Country", and began wearing the clothing of the old Roman kings. This deepened the rift between Caesar and the aristocratic republican Senators, many of whom he had pardoned during the civil war.
In 45 BC he had been named dictator for ten years. This was followed up in 44 BC with his appointment of dictator for life. A two-fold problem was created; firstly, all political power would be concentrated in the hands of Caesar for the foreseeable future, in effect subordinating the Senate to his whims; and secondly, only Caesar's death would end this. As such, a group of about 60 senators, led by Gaius Cassius Longinus and Marcus Junius Brutus, conspired to assassinate Caesar in order to save the republic. They carried out their deed on the Ides of March 15 of March 44 BC, three days before Caesar was scheduled to go east to defeat the Parthians."
You see, this is to some extent history repeating a new Roman Republic as it were. This is why we should be worried.