dudsville
I have extensive knowledge in this area having seen many educative films on the topic. The government have a responsibility to tell us, but would patronisingly withhold the information because of our tendency to fall into a state of anarchy.
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I think you may be right.
I'll be seventy at the end of the year and when I was a child there was endless negative and often quite scary talk of aliens (like Martians in 'The War of the Worlds'), and Russians.
My back garden backed onto allotments, some of which were vacant and overgrown. I used to get up in the morning (and sometimes at night), and look out over the allotments, expecting to see a crater with a Martian space ship in it. Thankfully I knew no Russians :-).
Then there was 'Quatermass and the Pit', I think that was on TV on or around late 1959-early 1060. I only saw the first episode and that was enough for me, every week when that thing (I couldn't even say the name), was about to come on telly, I went up to bed with no trouble, which was unheard of. Unfortunately I could still hear the pounding theme music which floated up through the ceiling and the floorboards of my bedroom! It took me a long time to get over that. Hee hee, happy memories.
(I forgot to mention The Bomb and the film of Neville Shute's 'On the Beach'. I obviously didn't go to see the film, saw it years later on TV, but there was an excerpt on the radio which I heard. When the lovely young couple are about to take suicide pills to avoid radiation sickness, they have to give it to their baby too. Then they discuss the symptoms of radiation sickness.
Then came Bob Dylan....)