How could career interventions promote a fair and sustainable human development? In order to answer this question, first an account is provided of the factors that contributed to defining the first general model for career interventions and to the emergence of the second one. One such factor was a political dispute over the purpose of these interventions: should they aim only to provide companies with the required workforce, or should they both foster the optimal individual development and promote a richer and fairer social organization? In the current model, these interventions are supposed to help people manage their careers and, more generally, their lives. Designed with this objective in mind, such interventions meet the needs of people who live in postmodern societies. Nevertheless, to effectively prepare people for coping with the major challenges that humanity confronts today (such as decent work deficit, economic and social precarity affecting billions of young people, serious environmental and technological hazards, etc.), such interventions definitely need developing. Various proposals are made to contribute to solving these serious problems.