Learn from the computer industry. Today's computers are smaller, use less resources while being far more sophisticated. Yes, we can still have progress, but it must be defined in new ways.
Can all the world's 6 billion people have two car garages?
Not even all USA aspires for that two car garage. A different vision is needed for what progress is about. Shorter work week, less consumption, more time with family and friends, smaller lot sizes, shorter commutes, still higher technology. We don't have to go back to the stone age for protecting this planet. With current population, we are less harm to the planet if we don't try living in the stone age again. Solar electricity or smoky fires?
* Today's flurry of posts comes from reorganizing another part of my site.