Old Board Game Where You Aim to Become Dictator? It's Diplomacy.

Diplomacy (1959) is the classic. You don't literally become "dictator," but the goal is to control Europe through:

• Negotiating alliances (and betraying them).
• Moving armies/fleets simultaneously.
• Outmaneuvering 6 other players.

No dice — pure strategy, psychology, and negotiation. A masterpiece of interpersonal conflict.