I like this thought. Romans 14 gave hope that this would be a strength of the Christian faith which unfortunately didn't pan out in actual history. In that passage, Paul tries to reconcile fellow believers who were divided into those who felt guilty about eating meat from the pagan temples and those who didn't. Paul drives the attention away from the differences between them in hopes of maintaining the unity of believers.
If we achieve this on a complete level, there will truly be "no Greek or Jew, circumcised or uncircumcised, barbarian, Scythian, slave or free." (Col 3:3) We ourselves make these demarcations.