Possibly the most important man of antiquity, and even all of history, was Julius Caesar. Alexander Hamilton, the famous American patriot, once remarked that "the greatest man who ever lived was Julius Caesar". Such a tribute, coming from one of the Founding Fathers of the quintessential modern democracy in reference to a man who destroyed the Roman Republic, is testament to the enduring mark that Caesar left upon the world. The ultimate conqueror, statesman, dictator, visionary, and opportunist, during his time in power Caesar expanded the borders of Rome to almost twice their previous size, revolutionized the infrastructure of the Roman state, and destroyed the Roman Republic for good, leaving a line of emperors in its place. His legacy is so strong that his name has become, in many languages, synonymous with power: the Emperors of Austria and Germany bore the title Kaiser, and the Czars of Russia also owe the etymology of their title to Caesar. His name also crept further eastward out of Europe, even cropping up in Hindi and Urdu, where the term for "Emperor" is Kaisar.
Even in his time, Caesar was in many ways larger than life, and because of his legacy as virtual founder of the Roman Empire, much of what was written about – and by – him during his life and immediately after his assassination was politically motivated. His successor, Octavian Augustus, had a strong interest in ensuring that Caesar's life be painted in a favorable light, while Caesar's political enemies attempted to paint him as a corrupt, undemocratic dictator who was destroying the old order of the Republic. This makes it exceedingly difficult to separate historical fact from apocryphal interjection, as the writings of Cicero (a rival of Caesar's) and the later biographies of Suetonius and Plutarch can be misleading. Nonetheless, along with Caesar's De Bello Gallico, his famous notes on his campaign against the Gauls, they remain our chief sources for Caesar's life – a life everyone agreed was nothing short of remarkable and changed the course of history forever.
The importance of Gaius Julius Caesar Augustus (or as he was known from birth, Gaius Octavius "Octavian" Thurinus) to the course of Western history is hard to overstate. His life, his rise to power, his political, social and military achievements, all laid the foundations for the creation of an Empire which would endure for almost five centuries, and whose traditions, laws, architecture and art continue to influence much of Europe and the world today. Octavian was the first true Roman Emperor, and the first man since the Etruscan Tarquins, five centuries earlier, to establish a successful hereditary ruling dynasty in what had been a proud Republic for over half a millennium. He was a canny strategist, an excellent orator, a fine writer, a generous patron of the arts and enthusiastic promoter of public works, but above all he was a master politician. Octavian's great-uncle (and adoptive father) Julius Caesar was a great general, his rival Mark Antony was a great soldier, but as a politician Octavian outmatched them all.
Certainly, like all men, Octavian had his defects. Like many of the most successful politicians, he could connive, plot and prevaricate with the best of them, and he made full use of the emotional pull that his late beloved great-uncle had over the legions during the course of his rise to power. His justice was also famously heavy-handed, and he was not known for his mercy towards those he defeated in battle or marginalised political opponents. Yet despite all this, he still stands in bronze on Rome's Via dei Fori Imperiali to this day, along with the likes of Caesar, Hadrian, Trajan and Marcus Aurelius, and he is forever immortalised in all western calendars as the patron of the month of August, which was dedicated to him when he was deified, following his death, as Divus Augustus.