Caesar is defined as “Expansive” and “Organized”
“Expansive” means you construct Granary and Harbor at double speed. This enables quick population growth and prevents health problems – especially since you also receive a +2 health per city. Discover Pottery and Compass to take advantage of those buildings.
“Organized” means you have to pay less for your civics – making the usually expansive Police State, Vassalage, Environmentalism and Organized Religion less painful. It also enables you to construct the “Courthouse” and “Lighthouse” at double speed, making the discovery of Sailing and Code of Laws logical. The latter is generally more important as the first to discover founds “Confucianism” religion. Courthouses will also lead you to the Forbidden Palace – reducing the corruption in your empire.
As it was said before, although Sailing is available right away, it is not a priority – Bronze and Iron Working are more important. However, don’t neglect Sailing too long, as it leads to Compass – which give you the Harbor building. On the other hand, Civil Service and Machinery (providing Maceman) are not too important, as the Praetorian is powerful enough.