History is absolutely full of proven conspiracies. On our front page we have strong indications of one about CIA and Australian government:
Conspiracy is just planning in secret, which is fundamental to big business and to governments and to criminals. And to hospitals trying to get out of admitting fault.
Excerpt from Alex Jones' fantastic site on conspiracies
There are quite a few scintillating sites on the Internet that look at conspiracies vs 'conspiracy theory'. However Jonathan Elinoff on InfoWars has come up with this competitive list of proven conspiracies that most people would be embarrassed to dismiss.