So, to you civilization means to lose ALL cultures (languages, history, customs, and all nations) and favor and keep just one? OMD.
The word "Civilization" is derived from the Latin word for "city". The current idea of civilization dates from 18th-century France, when it was used to designate the highest degree in the development of a culture. Its opposite is barbarism, the condition of pre-statal societies. Those pre-statal societies are often absorbed into a civilization. In fact, the idea of civilization implies the merging together of several cultures, either primitive or historical, into a common tradition. It also implies a tendency for civilizations to extend globally. This means that for any given moment in history there is tipically only one civilization. The Greco-Latin civilization is the only one which exists nowadays and the only one which is effectively extending worldwide. That does not mean that all cultures encompassed by it must immediately perish, only that there is a clear hierarchy. Eventually, we can expect cultural differences within a civilization to become less important and perhaps even disappear into a single culture. If and when that happens most of the reasons for waging war will have disappeared from earth.
Could you explain this? How is a culture better than another one?
It means I don't believe in cultural relativism (for many reasons I won't go into at the moment). A culture that accepts female genital mutilation is to me clearly inferior to one that doesn't accept it, just like one which assigns women a secondary status is inferior to one which recognizes equality of the sexes. Those would be the most obvious examples. Also, a culture which institutionally divides people into closed groups according to race, language or religion could be very advanced in many ways, but it would always be inferior to a similar one which does not.