Hmm, are you saying there is absolutely no "conspiracies" or has never been?
Of course not, humans have been conspiring against each other since the dawn of civilization.
But we have a problem, we lump those actual conspiracies in with the phenomenon of conspiracy theorizing. A separate and largely unrelated phenomenon of human irrational thought.
So, no, there absolutely have been conspiracies. But they are mostly boring questions of history.
"conspiracy theories" however are probably universally false. Most likely every single one is either false, or if there's any truth it's hidden behind piles of bullshit.
Conspiracy theories are promoted and added to by conspiracy theorists, which are universally people who have little to no ability to rationally evaluate evidence with realistic probabilities and an unbiased (as possible) perspective. Usually people with zero science training even to a pretty amateur level.
There's a reason that conspiracy theories tend towards becoming increasingly convoluted. Because the conspiracy theorists keep adding more and more nonsense that they come to believe on top of it.
So no, conspiracy theories are 99.99% all crap.
Real conspiracies are things like.. Israel undertaking a conspiracy to abduct someone or something over some political issue, to take a random example.
What real conspiracies are are things we don't call conspiracy theories.
But conspiracy theorists deliberately muddy the waters to imply that if the former are real the latter are too.
There is a reason conspiracy theories tend to be extremely convoluted (while real conspiracies are pretty simple), and there's also a reason conspiracy theorists tend to believe in nearly all conspiracy theories all at the same time.
Because the conspiracy theory phenomenon is one where failures in the human mind cause viral ideas to come into existence on their own and evolve and self propagate using the same naturally selective forces all evolution does.
That's what conspiracy theories are, natural selection on the level of human ideas, in a subset of humans.
Which is why they have exploded in popularity and complexity lately. Because the internet, and especially YouTube, is essentially the wetmarket of the viral ideas, of which conspiracy theories are.
Which is why conspiracy theorists almost universally try to spread their ideas to you by YouTube, it's the most effective way to transmit them and it's how they were infected.
That is what I believe.