The period from which we have written records is called what

I do believe its scholars because prehistory as events that occurred before the existence of written records in a given culture or society. History refers to the time period after the invention of written records in a given culture or society.

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.