I think that it is passed on genetically, most definately. My Dad has anxiety, my aunt on his side is bipolar, my grandma, his mom, has anxiety, my great-grandma, his grandma, had anxiety, I have anxiety, my grandpa on my mom's side had anxiety and was a huge worrywart. I think it runs in families the same way things like arthritis, migraines, fibromyalgia etc. do. It's kinda sad but true, you get the bad along with the good. It would be nifty if they could just pick the good things out and pass them on wouldn't it? LOL!