As consigliere to Vincent Gigante's Genovese family, Manna occupied one of organized crime's more consequential advisory roles during the 1980s — a period when the family worked carefully to obscure its leadership and insulate itself from prosecution. His 1989 conviction on conspiracy to commit murder and racketeering charges reflected the scope of influence he had accumulated operating out of Hoboken, and the sentence that followed kept him incarcerated for over three decades.

Among those who participated in the Tate–LaBianca killings, Watson stands out for the directness and degree of his involvement — present at both nights of murders and identified by prosecutors and historians as the operative who carried out much of the violence itself. The crimes, which killed seven people over two nights in Los Angeles, remain among the most studied cases of cult-directed homicide in American history. His role illustrates how the Manson Family's structure translated ideology into action, with Watson functioning less as a follower than as an executor.

His career as a pirate captain lasted only a matter of months, yet Rackham secured a lasting place in the historical record — partly through the company he kept, including Anne Bonny and Mary Read, two of the most documented female pirates of the era. The brevity and relative small scale of his operations stand in contrast to his outsized reputation, which owes much to Charles Johnson's 1724 account. He was captured, tried, and hanged in Jamaica before the year 1720 was out.

Roman-Bardales operated at the senior leadership level of MS-13 across three countries, allegedly coordinating violence, overseeing military-style training infrastructure, and brokering alliances with Mexican drug cartels that extended the gang's criminal reach well beyond its Central American origins. The federal indictment against him reflects the scale of the enterprise: charges spanning narcoterrorism, racketeering, and human smuggling point to an organization functioning with the complexity of a transnational criminal network rather than a street gang. His 2025 capture, following years as a fugitive and a placement on the FBI's Ten Most Wanted list, marked the culmination of sustained cross-border law enforcement coordination.

The conquest he set in motion reshaped an entire civilization within a few years, dismantling one of the most powerful empires in the Americas through a combination of military force, strategic alliance-building with rival indigenous groups, and the catastrophic spread of disease. What distinguishes Cortés historically is the scale of transformation he engineered — and his willingness to operate outside sanctioned authority to do it, defying direct orders before he had even reached the mainland.