A society is a specific infrastructure for a collection of people that provides identity, social connections, rules, governmental structures, educational structures, etc. for the members of the group. A society can (and generally does) contain many cultures, ethnic groups, religions, economic classes, etc. Depending on the context of use, "society" can be a very small organization like the John Birch Society, a vast otherwise unrelated group of people "the internet society", a specific locality, "the society of Denver", "society within the United States"; or even a very broad spectrum like "Western Society".
The "end" or "collapse" of society is a common theme of numerous fringe and conspiratorial ideologies, and articles like "20 signs that SOCIETY is BREAKING DOWN!" have been produced in similar form for hundreds of years.