Yes, to be fair we have to note this was written in 2000 when we knew much less about the potential of solar and wind even though it was only 7 years ago.

I understand Jones won't be able to tell us whether his perspective on renewables would be different today. I am a little surprised he didn't think then that, although limited, the solar flux is great enough to provide all of our necessary needs and more ("a world with a damaged ecosphere, and very little usable energy (orders of magnitude less than now)" as long as we develop the technologies necessary to harness efficiently the energy provided.

I don't see a problem with his use of 'closed entropic system'. A closed system doesn't allow mass transfers with its surroundings but it permits energy transfer freely (by opposition to an 'isolated' system).