2. Reagan was responsible for the above through his various actions, supporting Solidarity in Poland and supporting Afghan rebels, etc.
3. We used Stalin to help us defeat Hitler. Then we had to face Stalin. We used Islamic fundementalists to defeat the Soviet Union.
4. Given the above, it is clear that even if we accept the FALSE PREMISE that support Afghan rebels led inevitably to Afghanistan becoming a terrorist sponsoring state, it was a bargain that was well worth it.
5. The premise is false, when it become clear that the US was supporting generals like Massoud, the man Bin Laden assasinated just prior to the WTC bombing. The Taliban were the creatures of Pakistan, not the US, and were created on Clinton's watch, not Reagan's.
This is a "what-if" scenario, which is not a valid analysis tool. Economy may have been torpedoed by lower oil prices and continuing deterioration in command economy. Decay really started with Khruschev, who formulated rising living standards as the goal, and continued with Brezhnev.