Yes, we often precede adjectives with "the" to mean "those things/people that are (adj.)" So "the rich" and "the poor" refer to rich and poor people respectively; "the traditional, the natural and the cosmopolitan" refers to those things that are traditional, natural, and cosmopolitan. Unlike some other languages, though, we typically do not make singular nouns out of adjectives that way. There's a sign in the window of a beauty parlor I pass on my way to work with a mirror and the words, "look at the beautiful." I take it to mean, "look at yourself; you are a beautiful person," but the grammar is wrong. I'm pretty sure the owner is Brazilian, and translated directly from Portuguese, but it just doesn't work that way in English.
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