In his twenties and thirties he worked in various capacities as a weaver, teacher, accountant, interpreter (for the French and British military), and journalist (for newspapers including Alger Républicain and Liberté, an organ of the Algerian Communist Party).

Instead of moving to Cairo as many Algerian nationalists had, he decided to live in France, where he was allowed to stay after various writers (including Camus) lobbied the French government.

In a tribute, the then French Culture Minister Jean-Jacques Aillagon said that Dib was "a spiritual bridge between Algeria and France, between the north and the Mediterranean."

The Algerian revolution (1954–1962) profoundly shaped his thinking, and made him eager to bring to the world's attention Algeria's struggle for independence.

The second part, L'Incendie, published in the same year the Algerian revolution started, was about Omar's life during the second World War.

The final part of the trilogy, Le Métier à tisser, deals with Omar's adult life as a working man in Algeria.