Gee... not only does this guy think that pristine wilderness no longer exists, but that humans lived on this planet for millions of years BEFORE dinosaurs.
I'm sorry, but both the author and NGS just lost a lot of respect from this Wilderness Photographer.
1) He states that the notion of pristine wilderness is gone, because most wilderness that is pristine is now 'managed' by governments
2) He does NOT say that humans lived before dinosaurs:
"Even when you see the early pictures of the West, it looks echoingly empty, yet from our perspective today we realize there were indigenous peoples living there - and for millions of years before, this was the playground and habitat of dinosaurs."
You could accuse him of confusing grammar, though.