Excellent MKULTRA testimony from a survivor of dissociative identity disorder (DID) formerly multiple identity disorder. Neither description conveys that the condition is created by trauma (torture), caused by people who serve deep state entities (including corporations) that have a vested in interest in mind control.
The beginner will find this information fantastic.
However for the determined, I have years of study documented in the tags below and can answer most questions for those who wish to understand more. It's a very complex and large topic that is more industrial than bespoke.