With the exception of geographically isolated nations (e.g., island nations or mountainous nations), what countries were able to establish their borders without massive bloodshed?

It is a common theme that instability in the countries that received independence after colonization is substantially the fault of how Europeans drew the national boundaries. However, this suggests that there was a better way to determine post-independence borders that would have been less problematic. Could it be that such violence is the norm?