Destroyer of Worlds: Eighty Years Under the Mushroom Cloud

From Hiroshima and Nagasaki to today’s first-strike doctrines, nuclear weapons remain the ultimate instrument of imperial power — and a perpetual threat to humanity’s survival.

There exists a weapon capable of unmaking humanity. It begins with a blinding flash so intense that, even through clenched eyelids and shielded faces, one could see the bones of those huddled nearby.

In minutes, it vaporises entire cities and sends thousands of aircraft plummeting from the skies. In days, it unravels governments and collapses supply chains, triggering chaos and hunger. Within months, soot and smoke shroud the planet, plunging global temperatures by 20 to 30 degrees Celsius and ushering in a new age of famine. In years, it erases our accumulated knowledge — and eventually even the memory of our existence — leaving only bones for some distant future discoverer to ponder. Soviet Premier Nikita Khrushchev captured the horror succinctly: “The survivors will envy the dead.”

This is the dark shadow that has haunted humanity since August 1945, when the United States first deployed nuclear weapons against the Japanese cities of Hiroshima and Nagasaki.

Hiroshima and Nagasaki: Mass Murder as Power Politics

On 6 August 1945, a US B-29 bomber named Enola Gay dropped “Little Boy” on Hiroshima, killing a third of its inhabitants instantly and injuring tens of thousands more. Three days later, “Fat Man” was unleashed on Nagasaki, with equally devastating results. At least 100,000 people died immediately; perhaps twice as many succumbed in the months and years that followed from the slow, cruel effects of radiation poisoning — which corrupts the body at a cellular level.

Japan, by then, was already in ruins. The US firebombing of Tokyo in March 1945 had killed over 100,000 people in a single night, leaving another million homeless. Osaka lost eight square miles to flames in one raid. By the time the atomic bombs were readied, more than a hundred Japanese cities had been destroyed. Historical evidence suggests the bombings did little to alter Japan’s strategic position; it was the Soviet Union’s declaration of war on 9 August that precipitated surrender.

In the United States, outrage was met with an official narrative crafted by Secretary of State Henry Stimson: that the bombings were necessary to “save millions of lives” and bring the war to a swift end. In reality, President Harry S. Truman saw the bomb as a geopolitical “hammer” to intimidate the Soviet Union. At the Potsdam Conference in July 1945, he hinted to Joseph Stalin of a “new weapon of unusual destructive force.” Less than two weeks later, Hiroshima and Nagasaki lay in ashes.

Nelson Mandela, in a 2003 speech condemning US aggression in Iraq, made this point plain:

“Those bombs were not aimed against the Japanese; they were aimed against the Soviet Union to say, ‘Look, this is the power that we have. If you dare oppose what we do, this is what will happen to you.’”

From Cold War to Perpetual Nuclear Threat

Emboldened by nuclear supremacy, Truman even threatened to annihilate industrial centres from Stalingrad to Shanghai — a sentiment echoed by Winston Churchill. The bomb became not just a weapon, but a pillar of Western imperial dominance, embedding itself at the heart of the Cold War.

As historian Domenico Losurdo observed, it is misleading to call a war “cold” when it began with the infernos of Hiroshima and Nagasaki. The threat of instant, total annihilation warped the political, economic, and strategic realities of the Soviet Union and much of the world. From Korea to Vietnam, and from China to Iran, the United States repeatedly brandished the spectre of nuclear destruction to advance its military and diplomatic aims — fuelling proliferation in the process.

Over time, Washington shifted from the doctrine of Mutually Assured Destruction — premised on the impossibility of winning a nuclear war — to one of counterforce. This strategy assumes the US could cripple an adversary’s nuclear arsenal in a massive first strike, a mindset that drove the deployment of American “Euromissiles” in Western Europe during the 1970s and still shapes policy today.

While most nuclear states reserve their arsenals for existential threats, the US refuses such restraint. In 2022, Secretary of State Antony Blinken stated that America could use nuclear weapons “in extreme circumstances to defend the vital interests of the United States, its allies, and partners.” Hiroshima and Nagasaki remind us that these are not empty words. The US remains the only nation to have used nuclear weapons in war — and its “interests” now span the entire globe.

The Moral Imperative

Eighty years after the bombings, the shadow of the mushroom cloud still falls across humanity. It is not merely a relic of history but an active instrument of power — one that has underpinned imperial ambitions, shaped the global order, and normalised the threat of annihilation as a tool of statecraft.

To commemorate Hiroshima and Nagasaki is not only to honour the dead; it is to confront the living danger of nuclear imperialism. It is to recognise that dismantling this machinery of death is inseparable from building a just international order.

Everything — civilisation, life, and the moral conscience of humanity — is at stake.