Do you have both the patience and interest to read a long article about the various sides and players in the movement for Scottish independence, leading to the referendum in mid-September? I've found a good discussion of the issue from The New York Review of Books.
Author Jonathan Freedland blames Margaret Thatcher for the Scots separatist movement, and he may be right. I'd put it differently - Thatcher convinced the English to change directions but for some reason the Scots didn't get the memo.