The same sort of challenges of integration, identity management, disaster recovery that were addressed as ERP and the rest of the enterprise application suite emerged will now have to be addressed in the world of SaaS. The scope of this work is vastly underestimated, as is the maturity of the available solutions targeted at addressing these problems.
If this theory of race is correct (and more research is certainly needed), it indicates a strong prescription: policies that encourage groups to retain their identity within a society will cause trouble, but those that encourage cultural integration will smooth things over.