Are braces necessary?

ⒶⓁⓁⒾⓈⓄⓃ ★★★ • Never tell me the odds
Do you think braces and good oral hygiene are necessary in our modern society?
  
Edit: some people don't need braces (lucky them). For the people who do, how "bad" do their teeth have to be? What do you consider "in need for braces"