His father was a local redshirt official from Brescia, his mother was a primary school teacher from Emilia and his grandfather was a Carbonari and a follower of Giuseppe Mazzini.

He moved with his family first to Milan, then to Palermo, to Forlì, to Varallo Sesia and, finally, to Reggio Emilia.

But after intense discussions, in particular with Torquato Gobbi, a bookbinder and member of the International Committee of Anarchist Actions, he left the federation in 1915.

In an open letter, Berneri criticized the group for its red tape and "lack of devotion.

The socialist movement began its catastrophic descent into the foundations of destructive egoism, thereby following the trajectory of the moral strength of Christianity, which became powerful thanks to its martyrs and fell into decline when the sacrifices of its supporters ceased.

In a warmed-up and blood-soaked atmosphere of war, an ordinary person falls into barbarism, and sometimes even turns into a beast.

On December 11, 1928, he was expelled from France and until 1930 was constantly harassed by the Belgian, French, Dutch, German and Luxembourg police during subsequent transfers and spent a lot of time in prison.

However, he continued to be widely published in the anarchist press in Italy, Switzerland, the United States and France.

I mean that the biggest danger of stopping and deviating from the revolution lies in the conservative tendency of the masses.Once the Spanish Civil War broke out, Berneri was among the first to rush to Catalonia, the center of a revolution spearheaded by the Confederación Nacional del Trabajo (CNT) and Federación Anarquista Ibérica (FAI).

[12] Beyond militant solidarity, Carlo Rosselli was tied to his critical support for the prospects of Bolshevism, while in those years Camillo Berneri collaborated with the clandestine organ of the libertarian socialist movement "Giustizia e Libertà", arguing with Rosselli on the stark differences between libertarian socialism and despotic socialism.

Berneri worried about the growing isolation of the revolutionary and libertarian achievements in Catalonia, Aragon and other regions, and fought vigorously for the close connection of war and revolution.

[17]In his 1936 book Thought and Battle, Berneri gave critical comments on the situation, warning of the danger of a Stalinist coup, and marked his surprise at the "anarchist government."

His political suggestions for hitting the operational bases of fascism were numerous, though unheeded, such as proclaiming the independence of Morocco, coordinating military efforts and gradually strengthening socialization.

Berneri was soon exposing the fierce repressions carried out by Stalinists that had prevailed since the advent of the government of Juan Negrín: the victims of massacres and disappearances included thousands of non-communists, anarchists and also non-Stalinist communists, like the POUM.

On May 5, 1937, Camillo Berneri and his anarchist friend Francesco Barbieri were taken out of their apartment by a dozen plainclothes men with red armbands and policemen.