Genetic lineages evolve through natural election, Social lineages do not, since the idea of a social class is based on intergenerational preservation of wealth, power and privilege. This creates less pressure on genetic lineages to adapt, since they are already close to equilibrium with an(artificial) environment. Furthermore wealth insulates these lineages from environmental challenge. Over generations these lineages become less fit The genetic linage of poorer people, on the other hand are challenged by the constant pressure to survive, even though this takes a toll on individual mortality, provided environmental pressure is not catastrophic, these lineages will evolve to become fitter These same pressures means increase the likelihood of genetic mixing. Over generations this makes them fitter As unfettered capitalism concentrates wealth, the shrinking lineages of the extremely wealthy become smaller and less diverse. When the fragile network that holds western civilization together, its electric, transport and information networks, they will have no idea how to fix it.