What term refers to an early system of paving roads with crushed rock and asphalt

According to thomas hobbes concept of the social contract, what do people exchange for the protection by the government?

According to jean-jaquees rousseau, individuals participating in a social contact agree to be ruled by

How did the russian revolution impact world war i? a) the russians required the allied powers to come to their aid and defeat the radical groups. b) the russians pulled out from the war, enabling the germans to focus on the western front. c) the russians created new technological advancements that were used by the allied powers to win. d) the russians created a new communist government that aligned with the central powers instead.