FDR was adamantly opposed to the British Empire, but not as opposed to the US Empire, and as a result, while supporting the British Empire in WWII, he sowed the seeds of its dissolution. I, personally, see this as a cause of much of the worlds ills right now. I think that FDR as well as the presidents which did things like the Washington Naval Treaty, the London treaty helped accelerate the slide into irrelevance of the UK. WWI did not help, and Woodrow Wilson did not do the British Empire any favors as well.
What says the forum?