Thanks for your clear answer. I agree with your perspective. I work with parents and educators and I always say that I work to "the coexistence as creating and maintaining reliable networks ties" (in Spanish: "El convivir como creación y sostenimiento de redes de vínculos confiables). I've just read the posts "It's the worldview, stupid". and "a wicked problem" and was enriching. I'll see the movie. (I was on holidays and I started to read your posts from the last one). Thanks again, Lía