In a egalitarian society, people are all treated justly and equally, whereas today in modern society, people have to protest and fight for social and political equality. They believe in an equal chance of opportunity, for example, if someone is born into a rich family, then they will live greatly, which more opportunities than the average person. Now-a-days, few people are born into rich familes, excusing the Royal Family, and less fortunate people do not have the opportunity to go to school, or get a proper education, where as some middle-class families do.
Hope I helped!
-Ossashiᕙ(❍╭͜ʖ╮❍)ᕗ