Plato was probably talking about a Democratic government which is composed of several leaders that are in-charge of particular cities and communities in a country. During his time, Plato is a known philosopher who spent his time discussing with people in plazas and squares arguing about almost anything under the sun.
Marco Polo found a new trade route (possibly several) that expanded trade in Europe.
Answer:
Churchill believed that the Soviets were installing communist governments and crushing political and religious dissent.