Todo modo (lit. "By all means"),^{[lower-alpha 1]} also known in English as One Way or Another, is a 1976 Italian satirical^[4] political drama film directed by Elio Petri starring Gian Maria Volonté and Marcello Mastroianni.^[1][3][5] It is loosely based on the novel of the same name by Leonardo Sciascia.^[1]

During a mysterious epidemic in Italy, numerous political leaders, industrialists, bankers, and business leaders of the ruling party, the Christian Democrats, arrive in a hotel called Zafer. With the party's central figure, president M., in their midst, they have gathered for an annual three-day retreat, inspired by the Spiritual Exercises of Ignatius of Loyola. The retreat acts as an atonement for their past crimes of corruption and unethical practices, and a renewal of the party's structure, leaders, and interests in order to maintain power in the country. The religious exercises are practiced under the guidance of priest Don Gaetano, who dominates all those at the retreat. Over the course of the next three days, one by one the leading figures of the party fall victim to a murder series, despite investigations by the police. In the last scene, M., the sole survivor of the party, walks through the terrain outside of the hotel, where the corpses of the murdered have been piled up. Reciting Loyola's spiritual exercises, he asks his chauffeur to kill him.

• Gian Maria Volonté as M.
• Marcello Mastroianni as Don Gaetano
• Mariangela Melato as Giacinta, M.'s wife
• Ciccio Ingrassia as Voltrano
• Franco Citti as M.'s driver
• Tino Scotti as the cook
• Renato Salvatori as Dr. Scalambri, the judge
• Michel Piccoli as He
• Cesare Gelli as Arras, Vice Commissioner

Volonté's character "M." (who was not in Sciascia's book but invented by Petri)^[6] was modeled after Aldo Moro, then prime minister of Italy.^[5] As Elio Petri noted in his diary, the actor was so absorbed with his role that he took on the movements and intonation of Moro throughout the filming.^[5] In the words of Petri biographers Federico Bacci, Nicola Guarneri and Stefano Leone, the film is a portrait of the "deviant" mental structure of the men in power of the Christian Democrats.^[7]

Todo modo met with much controversy during its initial release.^[6] In his review for L'espresso, Alberto Moravia argued that the film was driven solely by its "hatred against the ruling group currently in power in Italy".^[8] Leonardo Sciascia, author of the novel which the film was based upon, defended Petri's adaptation, stating, "Todo modo is a Pasolini film, in the sense that the trial that Pasolini wanted and was unable to bring against the Christian Democratic ruling class is now done by Petri."^[6] Two years later, after the Red Brigade's murder of Aldo Moro, the film, depending on the source, was either withdrawn from circulation^[4] or outright banned.^[9]

In 2014, the film, restored by the Cineteca di Bologna and the National Museum of Cinema, Turin,^[1][5] was presented at the 71st Venice International Film Festival.^[1] It saw a theatrical re-release the following year.^[1]

• Nastro d'argento for Best Supporting Actor Ciccio Ingrassia^[1]