As a parent, you can inhibit your children as toddlers by telling them "no!" all the time. Then, when it comes time to learn or be social, they now have inhibit

As a parent, you can inhibit your children as toddlers by telling them "no!" all the time. Then, when it comes time to learn or be social, they now have inhibitions to overcome. That's not to say there's no genetic component (my son, $deity bless him, has this anxiety/fear of lots of things - we're honestly not sure if we're unaware of some environmental cause, or if he's fighting genetics...)