How does the cause-and-effect structure support tuchman’s viewpoint that the new illusion of omnipotence must also be shattered? it shows that the war resulted in a new illusion of omnipotence. it contrasts isolation with omnipotence. it supports her viewpoint with facts. it shows that america was isolated. the answer is a

It shows that the war resulted in a new illusion of omnipotence."In April 1917 the illusion of isolation was destroyed, America came to the end of innocence, and of the exuberant freedom of bachelor independence. That the responsibilities of world power have not made us happier is no surprise. To help ourselves manage them, we have replaced the illusion of isolation with a new illusion of omnipotence" Barbara Tuchman

One was to hold a leash on a despot and future despots to come, another was set to ensure no despots ever came to power.