Dr Greer gets into the issues of zero-point energy and advocates a different strategy to out such technologies in a way that the oligarchy can't block doing so.
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I'm not sure how well thought-out that is. If they succeeded in getting the blueprints out--to the masses--maybe so--for a time. Sooner or later the oligarchy would likely lock up or exterminate 100's of millions if they had to. But that might be problematic enough ... and it might be a little early for them to try that. i.e. it might be too difficult to get away with sufficiently at this point in history.
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Would they stage WW3 to sabotage such an outing? In a flash--particularly given how much WW3 would also advance a lot of other genocidal and tyrannical goals.