Los vientos favorables is a study written at the end of the seventies. Its one vision of the trajectory of Basque nationalism, from Sabino Arana to the founding of ETA. It the book, the author covers the thought of the new generation the youth group EKIN or of Euzko Gaztedi- and explains the genesis and development the general crisis that ended with the founding of Euskadi ta Askatasuna (ETA). The text has a notable historical valor, as it comes from one of the protagonists of the events detailed in the work. It is also an excellent analysis realized by one of the top political thinkers that Basque nationalism has produced. The capacity to synthesize and the historical knowledge of José Etxebarrieta have given us a work whose importance is beyond time and the public for which it was written. The book is not a work of political archeology but a living description that maintains itself up to date about the historical circumstances of a people, who more than a hundred years ago became aware of their true situation.