Why Taiwan and the South China Sea matter to U.S. and the world

U.S. Senator Darline Graham faced sharp criticism during a debate when she admitted she did not fully understand the extent of America's national security interests in Taiwan and the South China Sea. The remarks highlighted the growing significance of these regions in U.S. foreign policy and underscored the complex geopolitical dynamics at play. Both areas remain central to strategic concerns, particularly due to their proximity to China and their role in global economic stability. Taiwan and the South China Sea are deeply intertwined in terms of security and economics. The South China Sea serves as a critical artery for global trade, with approximately $3 trillion worth of goods passing through its waters annually. It is bordered by multiple nations, including China, the Philippines, and Vietnam, and is a focal point of territorial disputes. Meanwhile, Taiwan plays a pivotal role in the global semiconductor industry, producing the vast majority of advanced chips used in everything from smartphones to artificial intelligence systems. This makes the island not just a political flashpoint but a linchpin of modern technology and commerce. Strategically, the two regions are linked through their shared vulnerability to Chinese military influence. If China were to attempt to reclaim Taiwan by force, the resulting instability could spill over into the South China Sea, where China already asserts dominance over most of the area. Analysts warn that such a scenario could trigger broader conflicts, affecting not only East Asia but also global supply chains and technological innovation. Hunter S. Marston, director of the Southeast Asia Program at the Lowy Institute, emphasized this connection, noting that a conflict over Taiwan could lead to increased military activity in the South China Sea and complicate efforts to maintain regional peace. The situation in Taiwan is further complicated by the ongoing tensions between China and the United States. While the U.S. does not formally recognize Taiwan as a sovereign state, it maintains close unofficial ties and provides the island with defensive weapons under U.S. law. This support has become a recurring source of friction with Beijing, which views any form of American backing for Taiwan as a challenge to its territorial integrity. During a recent visit to Beijing, former President Donald Trump hinted that arms sales to Taiwan could serve as leverage in negotiations with China, a statement that raised alarms among Taiwanese officials. China continues to assert its claim over Taiwan, sending military aircraft and coast guard vessels near the island on a regular basis. These actions are part of broader efforts to intimidate Taiwan and deter external interference. In response, Taiwan regularly conducts military drills, including its annual Han Kuang exercises, to prepare for potential threats. The frequency and scale of these activities reflect the high stakes involved in maintaining the status quo. Meanwhile, the South China Sea dispute persists, despite a 2016 international tribunal ruling that rejected China’s expansive maritime claims. The ruling, which found that China had no legal basis for its territorial assertions, was largely ignored by Beijing, which continues to enforce its claims through militarization and coercion. On the tenth anniversary of the ruling, the U.S., the United Kingdom, and twelve other countries reaffirmed their commitment to upholding international law and challenging China’s aggressive behavior in the region. As tensions continue to mount, the implications for global stability grow more pronounced. Any escalation in either the Taiwan Strait or the South China Sea could disrupt vital trade routes, threaten technological advancements, and intensify Cold War-style rivalries. The interconnected nature of these issues ensures that developments in one area will inevitably affect the other, making them crucial points of focus for policymakers and analysts alike.