I intentionally didn't mention them as they might be ONE CAUSE of it but not the MAIN CAUSE. Truth is I have found reports of verifiable Mandela Effects back as far as 1896 which kind of blew my mind because I thought for sure this started with Nikola Tesla and this seems to confirm my theory....I haven't done enough research yet to actually say he was the "first time traveler" all though I believe he might have been the "first modern human to time travel" and Nikola Tesla himself described doing so in his journal around the year.....you guessed it 1896.