Civics

What does it mean to be civilized?
I think humans are filled with such confusing definitions of what it takes and what it means to be "civilized". Mainly, the rules and restrictions are based on the cultures and religions.
Found in the dictionary:

Civilized: 
1. Having a highly developed society and culture.
2. Showing evidence of moral and intellectual advancement; humane, ethical, and reasonable

 But what does it mean to be in a highly developed society and culture? Education perhaps? Technology maybe? Okay. But what about simple things like clothes? In the 18th century, most countries feel that even revealing shoulders and ankles are considered improper and uncivilized, for the uneducated to do. In sweating hot nations, such as Africa, it's common to see both males and females shirtless. In Japan today, smiling too much, especially when showing teeth, is considered rude. As you can see, much of the rules for being civilized, is absurd.
Sometimes, I feel that being "civilized" might give a system order, but most of the time, I prefer chaos.