For 80,000 years humans have been using fire, spears, arrows, stone points, metal mining, grain cultivation, etc. to make our lives more comfortable and convenient and ostensibly to "improve on Nature". Come to find out, comfort and convenience are bad for our health - and they may have wrecked Nature irretrievably.
In an aboriginal environment, hunter-gatherers, fishing tribes, and subsistence multi-crop farmers lived longer, healthier lives than we do in "over-developed" nations. We need to walk, run, climb, swim, row, sail, sweat, shiver, dig, plant, weed, harvest, hunt for optimum engagement of our whole body and brain. Also, talk, argue, philosophize, sing, dance, and play music together.
The things described by religions as separating ourselves from God are separating us from each other and our own true social selves: greed, gluttony, envy, lust, sloth, anger, and pride. We have built a society with the premise that "pursuit of happiness" means comfort, convenience, and shiny objects - but that is a false premise based on false desires.
We need to live on less than 10% of the energy we now consume, and use it on an availability basis, i.e. make hay while the sun shines.
Cities, desk jobs, food markets, flush toilets, mining and burning, irrigation, chemical fertilizer, cars, trucks, planes, and ships are not sustainable. If you can envision a world without these things, and live it, then you can be part of the future.
Your lifestyle or your planet (C).