I would think that was obvious. Don't you learn British history in Pakistan?

English is widely used and easy to learn(much easier than Chinese and Japanese).

USA, one of the biggest English speaking nation in the world. We spend a lot (consume a lot of resources) and creates a lot of capital (sell a lot of services and products/goods). Our GDP (the amount of goods and services a country produces in a year) is one of the top two largest in the world. http://en.wikipedia.org/wiki/List_of_countries_by_GDP_(nominal) So if you want to do business with us, you must speak English, for the most part...but we have people from all nations here, including Pakistan, so you can still speak your language here. We except all people (or at least the smarter people here do). I hope I have answered your question. Select me as the best answer if you think I have answered well.

because of the British empire and American hegemony

@ tos r u kidding... don't u know China have biggest military and stronge economy than US.