Neoteny wrote:Loosely, yes, through natural selection, or something similar to it.
Let me put it this way. Earth is an open system. It is clear that everything around us has increased in "order" with respect to other planets we observe. Without any added energy, everything would degenerate back into dirt and rock and metal. However, we are getting, and have been for several billion years, a massive infusion of energy from the radiance of the sun. So, over time, a significant portion of that mass of energy has been harnessed by natural selection (after the genesis of life, abiogenesis may have come about from other energy sources) to build up the "complexity" and "order" in our world. This is done at the expense of a massive amount of entropy put out by the sun. Heat energy is (if I remember my science correctly) some of the energy that possesses the least "order" by nature. And there is massive amounts of heat given off by the sun to give even our overall solar system a net decreasing value entropy-wise, even with the small (though seemingly large to us) increase in order on our planet. Our complexity could never increase to a value higher than what the sun could put out (plus whatever we could create from what's around us), and the sun puts out energy magnitudes of order higher than we could ever hope to match.
Is that clear?
Not really. The only thing restricted by the output of the sun, is the output of the sun. It may very well affect complexity, but it certainly does not cap our capability of future complexity. It could at best only be a mere factor in such restraint.
In fact, its possible that the sun could diminish in output suddenly, which could theoretically spur an increase in complexity.
If you only meant that we are bound by energy amounts available from the sun, then yes, that amount is most definitely influenced by the output of the sun, except that it is not impossible to imagine that there may very well be a way to actually artificially increase the output of the sun. Obviously, it would mean using elements found here, though more likely somewhere else.
In any case, complexity is not governed by energy, per-se, and there is no direct causal link. It is possible that less would mean more complexity, and more would mean much less complexity. Sun output is only a factor, and cant be said to always increase complexity, or limit complexity.