To do so, I need some help from an American who goes by the name of Jared Diamond and who published "Collapse," and soon you will see that the 5 factors of the collapse of civilizations are reunited today.
Para hacerlo me voy a apoyar en la obra del norteamericano Jared Diamond, autor de "Colapso", y van a ver, en algunos minutos, que los 5 factores que provocan la caída de las civilizaciones se han producido.