Our modern notion of objectivity comes from Herodotus—like the modern reporter, he spent his time going around and collecting stories from people. And in contentious issues, such as the Persian Wars, he made it a point to address both sides. Thucydides, with his history of the Peloponnesian War—written during and just after the war—pushed this further. In both cases, the authors questioned their own assumptions. Socrates made an art of this, forgetting the product—the story—and obsessing on the questioning of his own assumptions. The attitude he solidified—constant inquiry, trying to escape his own opinions, knowing enough to know you know nothing—formed the hallmarks of 20th-century American objectivity, which The Sun, as one of the first "penny papers," did a great deal to create and solidify.