Explanation: Marcus Licinnus Crassus was a politician of the Late Roman Republic, and a member of the First Triumvirate, or 'Rule of Three Men'.
Whereas Pompey Magnus was a protege of the former ultraconservative dictator and an accomplished commander, and Caesar was a cunning, ruthless, charismatic populist, Crassus was... rich. That's about it. He was, however, quite fabulously rich, the richest man in Rome, who leveraged that money into political power, in part by loaning money to up-and-coming politicians (like Caesar). Crassus's wealth was estimated at around 200,000,000 sesterces. For reference, a common legionary soldier of this period would make around 450 sesterces per year.