I am...uncertain of what I should be afraid of here.
1) what's the curve look like on $GDP-per-kW/h over time, country-by-country?
2) Most of the US growth rate is due to immigration, because people want to live there. Globally, the population growth rate is tapering off gently everywhere, with Peak Humans currently estimated to occur around 2070.
Interesting... I found this video long ago and found it to be insightful. We discussed this stuff in biology when we went over exponential growth and it really got me thinking, but this guy has such an awesome way of simplifying it and his bacteria in the bottle analogy was awesome. Interesting to see you've found it as well.
The near future is scary, but once the problems are staring us right in the face, I think people will be more likely to come together to solve them. Human evolution is pretty scary. We have got to were we are from selection and if the selection process is altered, it could have adverse effects.