This truth is simply too foreign to us; it doesn't fit within our mental universe. Most of us don't particularly fight it, but we're very slow to integrate it.

So please bear in mind that this may affect you too.

This truth is massively good news, by the way, which is strange too: Bad news people believe instantly; good news they doubt instantly. 

All that said, here's the news:

Scarcity upon Earth has been fundamentally overcome.

We've been growing more food than we can eat for decades now, and we could grow much more if we needed to. Building houses for everyone would be no problem: we have the entire set of technologies and processes worked out, materials are available and there's no lack of people who'd be glad to work as a homebuilder.

Likewise providing quality medical care to all is well within our reach, and of course cars and roads are no problem. So, before I get to support and objections, I'll restate our main point: The doors to a golden age have swung open before us, but we're having a hard time accepting that it's real.

But Why Can't We Believe It?

Before I get to the details of our disbelief, let me tell you were you can find all the documentation you'd like:

The work of Julian Simon, especially The Ultimate Resource and The State of Humanity. You'll find lots of hard data in these.

The work of Stephen Moore and Johan Nordberg. Particularly It's Getting Better All The Time and Progress.

And just to support this a bit, here's part of a presentation from Norman Borlaug, the man who revolutionized modern agriculture (Nobel Prize, etc.) and saved a billion lives in the process. It was delivered in in September of 2000:

I now say that the world has the technology – either available or well advanced in the research pipeline – to feed on a sustainable basis a population of 10 billion people.