you think ti started it?
No. T.I. was clearly influenced by Cool Breeze and has even name checked Goodie Mob's "Dirty South" before. He's also heavily influenced by UGK, Eightball & MJG, and NWA. DJ Toomp credits Master P's "Bout It" and "Break Em Off" as being influential in the sound he created for T.I. What T.I. did was take all of that and build on Cool Breeze's reference to the trap and developed "trap music". He expanded on it and labeled the sound. He also brought it to the mainstream.