They predicted we'd all die from global cooling and then the climate warmed.
They predicted we'd all die from the hole in the ozone, but then that went away.
They predicted we'd all die from global warming, but the globe quit warming for the past 20 years (if you use satellites instead of the adjusted values), so they changed the claim to climate change killing us.
They predicted we'd go back to stone age because of peak oil and now we have more known oil reserves than when the predictions were made 50ish years ago.
Has there been one dread prediction that has ever been even close to true?