By Kim Yoo-suk President of Chey Institute for Advanced Studies As globalization gives way to a new era of economic security, the phrase “small yard, high fence” has become a strategic touchstone. Before building ever-higher fences — through tariffs, export controls and other protectionist tools — we must first define the yard we intend to protect. For the United States and its allies, including South Korea, this requires not just a defensive posture, but strategic clarity on what technologies a