I like that, it's a good summary, if brief on British history. But why do we Brits always put such a downer on it all (it was so much better then, now it's all terrible). Yes our history was cool (ethically questionable at times, but cool), and that is the reason we are a rich influential nation now. I'm not directing all this at you but lots seem to think like this. You say yobs (idiots or other generic term of abuse, for non British people), are abundant now. Look back real hard at the industrial revolution. the only difference then was that people like you were working alongside them for horrendous wages in poor conditions, and remembering how much better it was when you'd lived on a farm.
And from that rambling, inconsistent and dubiously topical dialogue, I'll give you my conclusion. Britain (without sounding too arrogant) has massively influenced world history, and still is in many ways. We, or settlers originating from these isles, have had major effects on so many nations already mentioned here (good or bad), from America and Canada, to Australia, India and Hong Kong.