Once a civilization is created and sustained education is the first start of any civilization. First off, having a strong educational system and creation of institutions no one would be able to learn from the brilliant people in life who philosophize and create the educational system we have today. From people thinking and voicing there brilliance the world could learn and people soon would start to create the ancient forms of law, medicine, education. Then ancient Greeks and Romans sparked the world with there civilizations and people started to use there ways and lifestyles.
Another key value in creating a civilization is a strong law making body and balancing of power in the government. Without laws the world would no longer be civilized and disciplined it would be a neanderthal mess. Laws keep order and balance to the world making sure everyone is in line and the people who don't cooperate get the consequences that condemn them to the fortifications of a penitentiary. Without balance of power in the government one person could have all the power and control the whole civilization without anyone stopping them. This is where a democracy comes into play with the Greeks having one of the very first successful democracy.
Without medicine a civilization would most likely not survive, with all the diseases that come from around the world ranging from malaria to the common cold all of these different sicknesses usually ended in death. Medicine in a civilization would try to make people immune so the civilization wouldn't get wiped out entirely. Therefor medicine being a very important role in survival. "A wise man should consider that health is the greatest of human blessings, and learn how by his own thought to derive benefit fro his illnesses".