From the time

that Cloning became the primary
form of human reproduction, 
a Culture of  Replication evolved,
with society dividing into
three opposing classes:

Conservative Replicants
who considered it their mission
to enhance, but preserve
the human race,

Radical Hybrids who advocated
the advancement of the species
via unfettered experimentation--
and low level Propagators
who continued to breed...

Ongoing class tensions
frequently lead to street battles
known as the Genetic Wars...