As Halloween welcomed the world’s seven billionth person, there has been renewed interest in meeting the food, shelter, and water needs of a large and growing global population. One recent article in the Washington Post (10/30/11) attempted to make 7 billion a tangible number that kids can wrap their minds around by describing 7 billion M&M’s filling three Olympic-sized swimming pools. While I think this is a useful exercise, when thinking about 7 billion people, not all people can be counted equally. In terms of resource use, each of the over 300 million United States citizens are like bloated, entitled M&M’s squeezing their smaller brethren out of the pool.

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