The Romans were seemingly unimaginative; therefore, they chose to copy Greek artists.
Soviet Union was the first country
At first, Caesar lived under an aristocratic republic, where a small group of rich and influential men controlled the government and most positions of power. But after Caesar defeated the Pompeians in the civil war, he converted it into an autocratic dictatorship, with himself elected as the dictator for life.
Combative religions struggle is the cause