[zeven7]

They burned non-renewable resources at an unsustainable pace, like nothing ever seen before in history, resources that took millions of years for the Earth to produce, gone in a century, to make themselves wealthy - among other things.

[danaris]

But a huge portion of what they burned those resources to produce was energy—both to generate electricity, and to power their vehicles.

We now have renewable energy sources for both of these things spinning up faster than ever. It won't be all that long before we can generate a majority of our energy with clean power that doesn't require consuming any non-renewable resources.

No; much more important differences between then and now are the top marginal tax rates and the labor power.