Why South Korea’s Coexistence Policy Could Make War More Likely
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South Korea’s pursuit of peace and coexistence with North Korea could increase the risk of conflict if Pyongyang interprets Seoul’s restraint as weakness—underscoring the historical lesson that lasting peace requires credible strength and deterrence.
Key Insights
South Korea’s pursuit of peaceful coexistence could increase the risk of conflict. If Pyongyang interprets Seoul’s restraint as weakness, de-escalation may encourage greater coercion rather than reciprocity.
History warns that appeasement can embolden aggressive regimes.
Chamberlain’s efforts to avoid war failed to deter Hitler, while Reagan and Thatcher showed how strength in confronting Soviet pressure could create the conditions for meaningful diplomacy.
Seoul and Pyongyang are moving in opposite directions. While the Lee administration pursues de-escalation, North Korea continues fortifying the DMZ, expanding its nuclear and missile capabilities, and deepening military cooperation with Russia.
South Korea is approaching a dangerous crossroads. The recent reduction of U.S.-South Korea military exercises makes it even more important that Seoul’s pursuit of peace not be mistaken by Pyongyang for weakness.
President Lee Jae Myung has made peace and coexistence central to his approach toward North Korea. In his 2025 Liberation Day address, Lee pledged respect for North Korea’s political system, rejected unification by absorption, and called for peaceful coexistence. A year later, he went further, proposing dialogue aimed at moving beyond the Korean War armistice toward a permanent peace regime.
The pursuit of peace may sound noble—and even necessary—given North Korea’s nuclear arsenal and its ability to inflict catastrophic damage on South Korea.
But history offers a stark warning: the desire to avoid war does not always prevent war. It can encourage the very aggression that makes war more likely.
When the Pursuit of Peace Becomes Appeasement
The danger begins when an aggressive regime interprets accommodation not as goodwill, but as weakness. When intimidation produces concessions, there is little incentive to stop intimidating. Each successful threat can encourage a larger demand. What one side intends as de-escalation can therefore become an invitation for greater coercion.
Europe learned this lesson in the 1930s. British Prime Minister Neville Chamberlain pursued appeasement toward Adolf Hitler largely in the hope of preventing another devastating European war. The 1938 Munich Agreement allowed Germany to annex the Sudetenland. Chamberlain returned to Britain declaring “peace for our time.” Within a year, Hitler invaded Poland.
Chamberlain pursued appeasement to prevent war. Instead, it helped create the conditions for war by reinforcing Hitler’s belief that further aggression could succeed without decisive resistance.
Peace Through Strength
The Cold War offered a different lesson. As the United States and Soviet Union accumulated nuclear arsenals capable of catastrophic destruction, détente and peaceful coexistence appeared to be the safest path. Yet by the late 1970s, the Soviet Union had continued expanding its military power and influence even as the West sought to reduce confrontation.
Ronald Reagan rejected the assumption that avoiding war required accommodating Soviet pressure. Together with British Prime Minister Margaret Thatcher, he rebuilt Western military strength, reinforced NATO, and demonstrated that further Soviet expansion would meet determined resistance.
Critics warned that their confrontational approach could provoke nuclear war. Instead, Reagan’s willingness to stand firm helped restore deterrence and eventually enabled him to negotiate with Mikhail Gorbachev from a position of strength. Reagan did not reject diplomacy. He rejected diplomacy built on weakness.
The lesson was simple: peace is more durable when an adversary believes aggression will fail than when it believes intimidation will produce concessions.
What Is North Korea Learning?
This is the question South Korea must ask today. President Lee may intend coexistence, reassurance, and reduced tensions as steps toward peace. But in deterrence, intentions matter less than how they are perceived by the adversary.
Since taking office, the Lee administration has pursued de-escalation toward Pyongyang—halting border loudspeaker broadcasts, restricting anti-North Korean leaflets, seeking to restore the 2018 inter-Korean military agreement, including restrictions on military activities near the border, and now calling for a permanent peace regime.
North Korea, meanwhile, is moving in the opposite direction. Pyongyang continues to fortify the DMZ, advance its nuclear and missile capabilities, deepen its military partnership with Russia, and gain battlefield experience through its participation in the war against Ukraine.
The contrast is striking: Seoul is lowering its guard to reduce confrontation while Pyongyang continues preparing for it.
If Pyongyang interprets Seoul’s restraint not as goodwill but as declining resolve, it may draw a dangerous lesson: Pressure works. And if pressure works, Pyongyang will only become bolder and demand more.
South Korea at a Dangerous Crossroads
The recent reduction in U.S.-South Korea joint military exercises could send an even more dangerous signal. As NVNK recently analyzed, if President Trump’s decision reflects growing frustration with Seoul rather than simply an opening toward Pyongyang, the potential consequences for allied deterrence should be a serious warning for the Lee administration.
President Lee’s calls for peace and coexistence may sound noble. But history teaches that peace requires more than good intentions—it requires strength and resolve.
If South Korea fails to learn that lesson, a policy intended to bring peace could instead make South Korea—and the Korean Peninsula—more vulnerable to conflict.
