The whole thing is just cyclical, that's all. 1975 was 32 years ago, and it's time once again stir up the masses. The last time they did this before '75 was the early 1940s, another 30 odd years. People are realizing the end isn't comming anytime soon, so desparation on the part of the GB kicks in as a matter of course. Once the numbers begin to dwindle becasue of it, they'll shut up for a while again.
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