Altering our DNA only seems like a good idea on the surface.
Sure they talk about obesity genes and disease genes and all
that, but our species has evolved on its own to meet the
requirements of our environment. And part of that evolution is
we are among the least adapted species meaning we already can
survive in a variety of niches without threat of extinction.
When we start messing with our coding we are creating artificial
adaptations, that cause us to be more adapted to a specific
niche or conversely opens the modified human to harm or an
attack or death from something most unmodified humans take for
granted. Take something like a GM Crop that produces a toxin to
fight Pest A, in doing so it might attract more attention from
Pest B, or result elimination of the deaths of the weaker
plants, which Pest A usually ate, which allows the weaker to
breed in a genetic weakness that reduces crop yields
significantly. Say we introduce a new gender chromosone into
humanity one new chromosone could introduce three ne