What does Clifford say was the main reason for NATO and the Truman Doctrine?

"We weren't concerned about markets; we were concerned about preventing Soviet  control of larger areas of the world than they already controlled. When the Second  World War ended, France was decimated. England was almost brought to its knees,  you'll remember, and if Hitler had moved at one time, he could have probably brought  them to their knees. The Soviet Union had gone through the most traumatic experience  of its career. I read that in the Second World War it's estimated that the Soviet Union lost  between twenty-five and thirty million men. So I think they were just determined that it  was never going to happen to them again. But an enormous vacuum had been left in  the free world by the end of World War II, and the Soviet Union was determined to move  into that vacuum. Now, that was the basis of the Marshall plan when we were thinking  about reviving Europe. At the time the Soviets were pressing and searching and trying to  find every soft spot where they could insert themselves. That was the reason for the  North Atlantic Treaty Organization; it was the reason for the Truman Doctrine."

the correct order is:

you're your own worst enemy:

they're going to say what they say, but

their opinions aren't holding you

back. it's your self-defeatist

attitude that's keeping your work

from getting its due.