i guess everyone is greedy. we want more even if we have enough. so long as something sparks your desire, you will incessantly want something or someone. but that's nature, i suppose. there never really is an "all that we've ever wanted", because we will continuously want, want, want.
as far as necessities go, i don't think we really need anything, either. it's all conditional-- if your calculus teacher tells you to go get a specific calculator for his/her class, then you're going to "need" this specified calculator. if you're going to a formal and you don't have any dress attire, you're going to "need" a tuxedo or a dress to match the occasion. but we don't really need these items to survive, see. to feel the need for something is only conditional. even the three necessities that welfare programs mention: food, clothing, and shelter. we don't necessarily need a roof to stay under (many live on the streets) and we weren't born with clothes. and we wouldn't need food, either, if it weren't for this condition: to live. if we want to live, we need food. thus, i have mostly concluded that every need sparks from a desire. and necessities are all in perspective to their corresponding condition(s).
and then what? soon, these people (under these conditions) will want clothing after they have gotten some food, and then with that, they'll want shelter, and then with shelter, who knows?
we don't need anything. we want everything.
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