| A few weeks ago I posed a series of "order of magnitude" thought experiments about the future of people.  I didn't get much response, probably because they were thought experiments, and not multiple-choice surveys where people could just click to vote.  Also asking people to think rationally between Thanksgiving and Christmas is always a challenge :) But let's consider them together.  They all have the following schema: What if x?  Would things be better for you, or worse?  Choices for x included: 
What if the world had {2X, 4X, 10X} more people in it?
What if everyone made {2X, 4X, 10X} more money?
What if everyone was {2X, 4X} bigger?
What if everyone was {10%, 20%} smarter?
 What's interesting about these questions is that although there were posed hypothetically, there are definite trends.  From the recent past (say 100 years) through today, the following are unequivocally true: 
The world has far more people in it (about 8X in the last 100 years).  The trend is that in the next 100 years, this growth will continue but at a slower pace.
The world is far more productive (about 4X in the last 100 years).  The trend is that in the next 100 years, this growth will continue and perhaps even accelerate. 
People are much larger (about 30% by weight and 20% by height, in the last 100 years).  The trend is that in the next 100 years, this growth will continue but at a slower pace.
 The last question is less clear; have people become {less intelligent, more intelligent} in the last 100 years?  An open question, I would say; the Flynn effect indicates "more intelligent", while population analysis suggests "less intelligent".  And in the next 100 years, will the trend be up, or down? You know what I think, but what do you think?  
Here's today's survey: In the next 100 years, will people be more intelligent, or less intelligent?
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