Trying to blame all the problems of the 80s on one person is pretty ridiculous.
I can't see anyone trying to do that, Dave. And there can be little doubt that MT became PM at a particularly trying time, economically and culturally. Her lasting legacy, however, is - I believe - both culturally destructive and socially divisive.
As with all such individuals, she was a complex amalgam of the the various forces around at that time but she did little to reflect that in her own personality and dealings. Putting aside for a moment that she was smug, self-satisfied, patronising, unable to negotiate, compromise or even accept the possibility of alternative views and perspectives, her single most dangerous trait was extremism. She moved the Tories to the extreme right, made extreme statements and pursued extreme policies. She was utterly delighted when the Falklands issue arose because that gave her the chance to deflect the growing chorus of criticism from within her own party and distract the electorate with a war, something right-wing leaders are prone to do at times of difficulty. Considering the swingeing cuts she'd made to the armed forces, that they managed even to reach the islands was astonishing. But that aside, her divisive approach to the nation's problems almost brought catastrophe to the country.
One thing we learn from history is that extreme leaders breed extreme responses; in her case, and not without a certain irony, an organisation with her initials arose and succeeded in taking over the city of Liverpool. Militant Tendency, under the leadership of Derek Hatton, infiltrated the Labour party in the city and managed to wrest control from the long-serving Labour stalwarts. It was surprisingly easy for them but the example of the
Nationalsozialismus in Germany in the early '30s had provided them with a template.
By the time her own party forced her out, she'd succeeded in alienating most of the Tory party, most of the armed services and just about all the electorate North of Watford. She left the country with a depleted manufacturing base (although that was in progress a long time before she arrived) a get-rich-quick mentality in the country and almost single-handedly eradicated the idea of volunteering. More than anything else, she divided, and I don't believe that's the sign of a good leader.