US global leadership directly tied to its leadership and dominance over the global commons
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In 2003, Barry Posen wrote a seminal piece on the defense and security benefits of unchallenged freedom of operation in the commons entitled, "Command of the Commons: The Military Foundation of U.S. Hegemony."" Posen argues that dominance in these shared domains serves as the foundation of the leadership role that the United States holds in the international system. He states, "Command of the commons is the key enabler of the U.S. global power position. It allows the United States to exploit more fully other sources of power, including its own economic and military might as well as the economic and military might of its allies." Posen's work on this topic brought to the forefront the role that the global commons play as a key enabler of U.S. defense and national security strategies.
Indeed, global commerce, travel, and information have greatly contributed to the growing wealth of nations and to the stability of the post-Cold War international system. The world's seas, air, space, and-more recently- cyberspace also play critical roles in states' national defense and their ability to conduct military operations worldwide. The United States relies on freedom to operate in the commons in order to protect the U.S. homeland and its vital national interests.