What physical and cultural factors might influence the ways a country's boundaries are established?

Answer 1

Physical:
- Oceans
- Rivers
- Mountains

Cultural:
- Language
- Religion
- Ethnic or racial origin
- Economy

Answer 2

The only factor that comes into play is the size of their army. Culture plays no part in the boundaries only within the boundary does culture play a part. Having said this, There is presently a section in Canada that wants to separate itself from Canada but does not want parts of itself to separate. Some of these people are planning on resorting to terrorism to get their way. Its going to be intetesting in the years ahead.