Under which leader did the Pax Romana begin to stabilize Europe?

Pax Romana, (Latin: “Roman Peace”) a state of comparative tranquillity throughout the Mediterranean world from the reign of Augustus (27 bce–14 ce) to the reign of Marcus Aurelius (161 –180 ce). Augustus laid the foundation for this period of concord, which also extended to North Africa and Persia.

c. troops marched forward in close formation against newer, more accurate weapons

calvin taught his followers that human beings needed to follow strict rules to overcome their nature and do good. second choice