One way to look at “developed” over “developing” is to check out the energy use per capita (per person) . “developed” countries use a lot of energy per capita - cars/mass transit, mechanized farming, mass production,etc.
I don’t have all the numbers, but certainly in energy terms the USA is the most “devloped” (or wasteful mabye - although maybe GDP/energy use would show if it is waste or not) with Japan up there, Europe, and China way behind but closing fast.
What energy usage will also show is that for instance China will never reach the energy use per capita that the USA enjoys now . Why not? - because if they did they would be using more energy just by themselves than is produced in the whole world today. There is not enough usable energy (in the forms mainly of oil/natural gas/coal) for China (much less the whole world) to be as energy “developed” as the USA or Europe.
The fact that China’s economy is growing fast (and with it their energy needs especially oil/natural gas) will be one of the drivers of conflict in the near and long term over who gets the access to what is left (most of what is left in terms of oil/natural gas is in the Middle East and somewhat also in Russia and former soviet union countries).
So, while many countries are “developing” they will not all be able to be “developed” because in terms of easily produced energy, it is a zero sum game, and every year brings us close to the time when there is not enough to go around.
and also
and under speeches look at :
http://www.simmonsco-intl.com/
As for a positive sum world - that is only true if energy supplies can continually grow. So far they have - but we are reaching a peak when the supply will level out and then start falling - that will actually be a negative sum game then.
Agricultural yields are already leveling out due to soil depletion/erosion/ farmland being converted to housing/etc. With energy becoming more scarce, the yields (which depend so much on energy in terms of pumping water, mechanized farming, fertilizer production from natural gas, etc) will be falling and with population still growing the stuff will be hitting the fan (and already is in some countries).
Another more drastic look at things (but not less valid necessarily) is