According to the therapists I've seen, my insecure attachment started when I came out of the womb crying and didn't stop for almost 10 months. (Well, I cried 14 to 20 hours a day, so I did stop now and again. I didn't sleep much, either - most babies sleep more hours than the hours I spent wailing) It took them 10 months to figure out what was wrong with me and help. So basically the world has never been a safe place for me, because I was born in pain and it took 10 months before someone took it away. A baby just feels "I'm hurting. My mother is there. I'm hurting." and thus, everything is associated with pain and thus nothing with safety.

Something like that.

Of course, the pain was only the start of things going wrong. But it sure didn't help.