British and American influence in the world

Lately we have worked on the topic of how Great Britain and the USA both have had a very big impact on the world, at different times and in different ways. One can certainly discuss to what degree this influence has been a positive or negative thing, and it is hard to imagine what the world would look like without this influence. It really also depends on the perspective you see things from.

Pick either the USA after WW2 or the British Empire and write a blog post which discusses its political, economical and cultural influence in other parts of the world. Your should include both positive and negative aspects and draw your own conclusion based on the arguments you have presented. Feel free to focus on certain countries/events/time periods as examples.