The first psychological laboratory was developed in 1879, in the city of Leipzig, Germany by . William James B. F. Skinner John Watson Wilhelm Wundt Sigmund Freud

Why does the united states constitution require that a national census be taken every ten years?

What kind of geography deals with people and how they affect the world ?

Imperial crisis inflation invasion pax romana great schismtrade during the , roman generals warred over succession. these conflicts drew soldiers away from the frontier and made the empire vulnerable to