If is a big and most consequential word in the English language. The word connotes wishes, conditionality, and often aspirations. If also is one of the shortest words holding a very long explanatory meaning which embodies hope but just as easily signals fatalism.
If, for example, the Islamic Republic of Iran were to adhere to and honour the current Memorandum of Understanding (MoU) with the United States, there may be a mutually beneficial peace settlement for the US, Israel, and its Arab Gulf allies.
If the accord succeeds, Iran would gain too for its own beleaguered population.