You and Robin seem to be focused on different time periods. Robin is claiming that after ems are created one group probably won't get a dominant position. You are saying that post-singularity (or at least post one day before the singularity) there will be either one dominant group or a high likelihood of total war. You are not in conflict if there is a large time gap between when we first have ems and when there is a singularity.

I wrote in this post that such a gap is likely: http://www.overcomingbias.com/2008/11/billion-dollar.html