Good question!! our sys has parts that are formed from trauma, and some parts that are not! Our original system itself was formed from trauma (we have p-DID), however, many of our headmates, subsystems, etc. are not formed from trauma at all. In other words, we split headmates without stress or trauma being involved, and it happens all the time to where we feel like being partially endogenic affects us as a whole

I hope this makes sense, it's a little complicated ^^