And James Hewitt is really Harry’s dad.
I heard one that James Goldsmith was Diana's dad. If you look at photos of Diana and Zac Goldsmith next to each other, they do look very similar.
On that same topic, there was also a suggestion that Barbara Bush was the daughter of Aleister Crowley.
Not that it was a conspiracy at all, but the fact that Laura Bush (accidentally) killed a man in a car crash in 1963 is far less known than you'd expect.
A swerve from the idea of Bill Gates being evil and wanting to destroy the world, somebody I heard postulated that Bill Gates' motives with vaccines might not be as altruistic as is widely believed. In the same way that the financial success of Microsoft was built on versions of software that had to be continually bought again and again for every computer as they were updated and made obsolete, getting the whole world depending on vaccines that keep needing to be boosted/updated every few months is an enormous money spinner.
I know he doesn't need the money, but for billionaires, it has long ceased to be about the actual buying power of the money and it's all to do with the power/influence/control/self-validation it brings them.
I'd forgotten about the Georgia Guidestones, as somebody mentioned upthread. I guess those stones are proof-positive of a conspiracy (or at least conspiratorial desires), as it's a massive (and very secretive) undertaking to create such a grand monument to something that some group doesn't fervently believe in. It's hardly just a throwaway comment that "I reckon this planet is way overpopulated".
That fact that it's heavily protected and overseen by the local authorities does suggest that it bears some mark of official endorsement. If it were just some crackpot farmer putting up a wacky big edifice in his field displaying his eccentric views, I don't see how or why the local authorities would care about protecting it - much less apparently revering it.