Reagan built a resume on taking credit for the work of others. He ran against an voter's initiative to establish an income tax withholding in California. Remember his "Taxes should hurt," statement? Then, he took credit for the surplus the withholding created after his side lost and it was passed into law. Containment and attrition were official government policies, starting with Truman. Our strong post war economy was too much for the Soviets to compete with. Reagan did not have that much to do with anything major. The proxy conflicts they were suckered into including Vietnam and their final, expensive foray into Afghanistan, did the damage.