The MMB’s activity was always supported by the school at Berriz, from which many missionaries would come.

After the change in the concept of mission brought by the Vatican Council, its sphere of action would extend to other depressed areas: Africa, Latin America, the Philippines… without forgetting certain parts of Spain, close by, but still very much in need.

This work was always carried out from a Christian perspective, following the steps and guidelines of Margarita María López de Maturana.