The Nature of Conspiracy Theories

Conspiracy theories seem to be proliferating today. Long relegated to a niche existence, conspiracy theories are now pervasive, and older conspiracy theories have been joined by a constant stream of new ones - that the USA carried out the 9/11 attacks itself, that the Ukrainian crisis was orchestrated by NATO, that we are being secretly controlled by a New World Order that keep us docile via chemtrails and vaccinations. Not to mention the moon landing that never happened.
But what are consp ...