>Biology is just a giant soup of whatever works. Any organizing principles are accidental or only exist in the eye of the beholder.
Evolution is the difficult-to-understand answer to this; we tend to anthropomorphically and erroneously assign intent and purpose in a chicken/egg and begging-the-question way.
Life continues until it doesn't; to assign any more gravitas to our collection of localized complexity is the same awe that a plebeian holds when presented with a meatball-and-spaghetti-on-a-wall painting of modern art; ignorant to them that it was all that remained after a rather particularly sticky food fight.
Evolution is the difficult-to-understand answer to this; we tend to anthropomorphically and erroneously assign intent and purpose in a chicken/egg and begging-the-question way.
Life continues until it doesn't; to assign any more gravitas to our collection of localized complexity is the same awe that a plebeian holds when presented with a meatball-and-spaghetti-on-a-wall painting of modern art; ignorant to them that it was all that remained after a rather particularly sticky food fight.