What is known to be an important contributing factor to the development of panic disorder?

Factors that may increase the risk of developing panic attacks or panic disorder include: Family history of panic attacks or panic disorder. Major life stress, such as the death or serious illness of a loved one. A traumatic event, such as sexual assault or a serious accident

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.