Aldo Moro was the quiet engineer of Italian democracy's most ambitious experiment. As president of the Christian Democracy party, he had spent years building what was called the Historic Compromise -- a governing alliance between his center-right party and Enrico Berlinguer's Italian Communist Party. In a country where Cold War fault lines ran through every institution, this was radical. Italy's Western allies opposed it; at the 1976 G7 conference in Puerto Rico, Moro was told bluntly that Communist participation in government would cost Italy international support, including financial aid. But Moro persisted. He believed that Italian democracy could not function with a third of the electorate permanently excluded from power, and that bringing the Communists into government would strengthen the system, not weaken it. He was widely expected to become the next president of Italy.

The ambush was choreographed with military precision. Four Red Brigades members wore Alitalia flight crew uniforms so they could identify each other and avoid friendly fire. Mario Moretti waited in a Fiat 128 with fake diplomatic plates. Other operatives occupied three additional cars positioned along the downhill street in northern Rome. When Moro's two-car convoy appeared at 9:00 AM, the trap closed. The two Carabinieri in the front seat of Moro's car died first. Then the three policemen in the escort car. Only one bodyguard, Giulio Rivera's colleague Iozzino, managed to return fire -- two shots before he was hit in the head. The entire firefight lasted seconds. Moro was pulled from his car and forced into a waiting Fiat 132. By 9:40, the getaway car was found abandoned in a nearby street with bloodstains inside. Moro had vanished into a network of safe houses that Italian police, despite the largest manhunt in the country's history, could not penetrate.

The Red Brigades held what they called a "people's trial." They issued nine communiques. They demanded the release of imprisoned comrades. Moro wrote dozens of letters from captivity -- to his family, to political colleagues, to the Pope. His letters grew increasingly desperate as he realized that his own party had adopted a position of absolute refusal to negotiate. The government, led by Giulio Andreotti, held firm under what was called the "line of firmness," arguing that negotiating with terrorists would legitimize them. Pope Paul VI made a personal appeal for Moro's release. The appeal went unanswered. On May 9, 1978, after 55 days in captivity, Moro was shot eleven times and his body placed in the trunk of a Renault 4 parked in Via Caetani, a street chosen for its symbolic geography -- halfway between the headquarters of the Christian Democrats on Piazza del Gesu and the Communists on Via delle Botteghe Oscure.

The official judicial verdict attributed the kidnapping and murder entirely to the Red Brigades. Thirty-two members were sentenced to life imprisonment in 1983. But the verdict never fully settled in the Italian public imagination. Too many details resisted explanation. How did the terrorists know Moro's exact route? Why did the police fail so comprehensively during the largest manhunt in Italian history? In 2013, Ferdinando Imposimato, one of the original investigating judges, stated publicly that Moro had been killed with the complicity of senior political figures. Conspiracy theories involving the CIA, the KGB, Italian intelligence services, and Masonic lodges have proliferated for decades. Journalist Ezio Mauro of La Repubblica called the Moro affair "Italy's 9/11" -- a wound that reshaped the country's politics and psychology, and whose full truth may never be established.

Moro's murder destroyed the Historic Compromise. Without its chief architect, the alliance between Christian Democrats and Communists collapsed. The broader political consequences cascaded through the following decade. President Giovanni Leone resigned three months after Moro's death. The Years of Lead -- Italy's era of political terrorism from both left and right -- continued to claim lives, culminating in the 1980 Bologna train station bombing that killed eighty-five people. Moro himself had foreseen the stakes. In one of his letters from captivity, he wrote that his party's refusal to negotiate would leave blood on their hands. Today, a memorial plaque marks the spot on Via Fani where the bodyguards died. Another stands on Via Caetani where Moro's body was found. Between those two points lies a distance of a few kilometers and fifty-five days -- a span that bent the trajectory of Italian democracy in ways the country is still reckoning with.