United States and Israeli air operations against Iran have revived a long-standing debate in Washington over whether outside powers can successfully force regime change. President Donald Trump has warned that an Iran armed with long-range missiles and nuclear weapons would pose an intolerable threat, but the renewed military pressure echoes decades of American interventions marked by ambition, backlash, and public fatigue.

The historical shadow looms especially large in Iran itself. In 1953, the United States and Britain backed a coup that removed Prime Minister Mohammad Mossadegh after he nationalized the oil industry, restoring the Shah to power. That intervention ultimately contributed to the 1979 revolution that brought the current Islamic Republic to power, underscoring how short-term strategic victories can produce long-term instability.

Throughout the Cold War, Washington pursued similar efforts in Latin America, treating neutral or left-leaning governments as potential adversaries. Later interventions in Afghanistan and Iraq further shaped public skepticism. The swift collapse of the Afghan government after two decades of American support, and the turmoil that followed the toppling of Saddam Hussein in Iraq, reinforced doubts about the effectiveness of nation-building and military-led political transformation.

Today, as operations against Iran continue, American public opinion remains deeply wary of new wars and regime change efforts. The legacy of past conflicts has created a divide between strategic ambitions abroad and a domestic audience increasingly cautious about the costs and consequences of intervention.