Burebista was a Getic/Dacian ruler, whom ruled between 82-44 BCE, and subjugated a number of tribes, including some Thracians groups and the Celtic Scordisci and Danubian-based Boii and Taurisci, and also a number of Greek colonies on the Black Sea coast. He all but succeeded in centralising the Dacians, but was eventually murdered by Tarabostes (Dacian tribal nobles) as his absolutist rule was detrimental to their personal liberties. The capital of this short-lived kingdom was the city of Argedava, located near modern Costesti in Wallachia, Romania.
Burebista's Getic state was so powerful and wealthy, that its believed Caesar actually planned to invade Dacia in 59 BCE, since he was appointed as Proconsul of Illyria in addition to being the governor of Cisalpine and Transalpine Gaul. Burebista was also said to have supported the Pompeian/Optimate faction against Caesar during the civil war in the 40's BCE.
According to Strabo, Burebista was advised by a holy man named Decaeneus, whom was the high priest of the powerful monotheistic Dacian cult of Zalmoxis, and that Burebista reset the calender from the alleged birthdate of Zalmoxis (believed to have lived in the 700's BCE), and to have ordered a general prohibition against the manufacture of wine in accordance to his religious beliefs.
Even after the break-up and reunification of Dacia by King Decebalus, whom ruled between 87-106 CE, Dacia was a civilized urban culture on par with the Greeks and Romans, possessing paved roads, piped water, literacy, coinage, and other arts and crafts.
What could have been the fallout if Burebista's powerful Getic Kingdom had outlived him?