Final answer:
President Ronald Reagan's 'peace through strength' approach and diplomatic engagement with Soviet Premier Mikhail Gorbachev played key roles in the end of the Cold War. However, the downfall of the Soviet Union and the rise of democratic movements in Eastern Europe were also critical factors, indicating that the end of the Cold War was a multifaceted event influenced by global dynamics and individual efforts.
Step-by-step explanation:
President Ronald Reagan played a significant role in the culmination of the Cold War through a strategy often summarized as "peace through strength". He increased defense spending by 35 percent, challenging the Soviet Union's ability to compete amid its own economic troubles. Reagan also fostered a relationship with Soviet Premier Mikhail Gorbachev, leading to agreements such as the Intermediate-Range Nuclear Forces (INF) Treaty, which eliminated an entire category of nuclear weapons and set the stage for further arms reduction. The Reagan Doctrine was emblematic of a forceful foreign policy that supported anti-Communist movements globally. Moreover, Reagan's initial aggressive stance began to soften later in his presidency as he and Gorbachev started dialogues on arms reduction, signaling a departure from the previous Cold War diplomacy.
However, it's paramount to recognize that the end of the Cold War cannot be solely attributed to Reagan's policies. The internal decay of the Soviet Union, the rise of democratic movements in Eastern Europe, and the broad push for global human rights played invaluable roles. This bottom-up momentum towards democracy and the loosening of Soviet control were tantamount to the fall of communist authoritarianism in several states and the eventual dissolution of the Soviet Union itself.
Ultimately, grassroots efforts, global economic changes, and the policies of leaders like Reagan and Gorbachev collectively influenced the end of this era. Crediting Reagan alone fails to acknowledge the complex, multilayered nature of this historical shift and the pivotal contributions of individuals around the world striving for democratic change.