Anxiety disorders can be genetic or caused by a traumatic life event.

This is absolutely true.

Almost every single person will have anxiety in their life. The most common way to get it is if any of your family members have it. Let's say you had an embarrassing moment in your life when you were younger. The simplest thing could cause you to have anxiety. Although I'm 100% sure about this, it is confirmed that if you have anxiety before you are the age of 20 years old, it is positive you have a family member that has it as well.