Irreverant, but perhaps not irrelevant, thought

I was watching a video yesterday about Mindfulness and the Brain, and heard the following:

• The brain comprises about 2-3% of body weight
  
• It uses 25% of the body's energy resources

Sound familiar? The United States has 5% of the world's population, and consumes 25% of its resources. Maybe a truly egalitarian/social justice view of the body would consider this grossly unfair? Or maybe, given that human societies are simply a larger-scale version of a natural system like the body, it is not so surprising that the world could have evolved to this state of affairs. (It is still our choice how to respond, of course).