Originally diplomacy was published by Avalon Hill in the United States. Unlike most other games, diplomacy has no factor of luck. It is a game of negotiation and strategy. There are no random effects like dice or cards.
Although some people believe the game is mainly about strategy (moving your armies and fleets in the right direction), I believe that the real game is about negotiating with other players on the board. This is also why I personally like the game so much. However, to understand properly how and where to move your units will definitely help.
If you are looking for a strategic game, with no luck, Diplomacy is your game. Like with many things in life: the proof will be in eating the pudding, so start today!