The term suggests you might be looking for a split archive (part1.rar, part2.rar). If you are attempting to download these for academic study:
En defensa de Pinker, en defensa de la ilustración - Primicias Download defensa Ilustracion multi rar
This is the most common modern reference. It is a best-selling book (often cited as a "paper" in academic contexts) that uses data to argue that the world is getting better thanks to reason, science, and humanism. The term suggests you might be looking for