I'm not sure I know what you're getting at. I can't imagine that the 3 billion residents of South and East Asia would agree, especially those in the Muslim world.
Yes, many of their cultures resemble Western culture superficially (and even in detail in some countries), but there's hardly what I'd call uniformity.
One can not think of any other culture as being the culture of the world.
Western culture is a like the cultural lingua franca of the modern age - many many people are familiar with it, even practice it to some extent - but that's not quite the same thing as adopting it wholesale for their own.
Snidely