I think Big History makes a good case that in the future lies greater and greater unity. To me, the Big History theme looks like this:
subatomic particles unite into atoms
atoms unite into stars and larger atoms
larger atoms unite into planets and compounds
compounds unite into chemical cycles
chemical cycles unite into prokaryotic life
different prokaryotes unite into a eukaryote
single cells unite into multicellular organisms
organisms unite into communities, ecoystems
meanwhile, neurons unite into brains
brains unite into cultures
cultures unite into nations, economies
people unite materials into technologies
So if you continue that theme into the future, our different peoples, ecosystems, nations, economies, technologies unite into a single, integrated unity of higher complexity. Its E Pluribus Unum over and over again.
Does anyone agree, disagree or have comments on this?