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Sustainability isn't a cost; it's an investment in relevance and longevity.
Women select men. That makes them nature, because nature is what selects. And you can say "Well it's only symbolic that women are nature", it's like no, it's not just symbolic. The woman is the gatekeeper to reproductive success. And you can't get more like nature than that, in fact it's the very definition of nature.
Profitability and sustainability are not opposites - they're two sides of the same coin.
The only way to do great work is to love what you do.