of the most prevalent technologies of the Known Worlds.
Your world may already be familiar with some form of genetic
manipulation. Indeed, almost every sentient species has
experimented with this technology, even before contact with
the Commonwealth. For example, many scholars theorize that
genetic engineering helped create the different subspecies
of Than. Certainly the
different castes' abilities have been genetically enhanced.
Perseids use genetic
engineering in preference to other technologies, creating
semi-organic machines, buildings and devices.
But no species pursues genetic engineering as enthusiastically
as Humanity. It is estimated
that nearly two-thirds of Humans currently alive have either
been genetically engineered themselves or are offspring
of genetically engineered parents. Most of these modifications
were fairly minor, aimed either at correcting genetic defects
or enabling normally frail Humans to adapt to hostile extraterrestrial
One common variation allows Humans to live in intense gravity
wells, enabling them to tolerate four or five Earth
gees without trouble. Other modifications allow Humans to
live and adapt to aquatic environments, poisonous air, or
intense cold. And of course, the Nietzscheans
have made genetic engineering a way of life, using extensive
gene modifications and selective breeding in their ultimate
goal of perfecting themselves and their descendants.