Hmm. That's a bit delusional, and you have a lot to learn about finite resources and nature. Climate change and ecosystem breakdown impact the supply of essential resources, and as much as humanity likes to believe we are above nature, we're dependent on it.

We can't drain the ocean, and relying on tech to replace what nature naturally produces is extremely inefficient and impossible. Capitalism survives on cheap inputs and efficiency, and water-wars and famine already occur.

Regardless, nothing survives without fresh water, and try growing food in dead soil. You can't.