It is a difficult choice sometimes whether to feel revolted at the male sex or merely to dismiss them as contemptible. - Isaac Asimov

[B]y 1204, the only place where the entire body of Greek learning existed, still intact, was Constantinople. As a result of the crusaders' conquest, however, Constantinople was ruthlessly pillaged and destroyed and almost all the great treasures of ancient Greek learning were lost forever. It is because of that sack, for instance, that we have only seven plays left out of the better than one hundred written by Sophocles. The tragedy of 1204 can never be undone and for all of time, only bits and pieces of the marvelous Greek world can be known to us.

Culture dictates invention

La religión persa era dualista, esto es, pintaba un universo en el que había un principio del bien y otro del mal…
"Hasta el retorno del exilio, el judaísmo había tenido un solo dios, considerado el autor de todo, lo bueno y lo malo. Pero después del retorno surgió un espíritu del mal, Satán, palabra que en hebreo significa "el adversario". Satán, en eterna lucha con Dios, no aparece en los libros bíblicos, de la época del exilio o anteriores, pero comienza a aparecer en los libros escritos durante la dominación persa".