your definition is so focussed on the Northern Ireland, Ireland border and serves only you and others like yous, self interest
That the definition would not be based on the living members alone, but also on past and future generations.
That is not allowing for the fact that borders change even in the last 15 years we have seen borders change in europe, even in the last year (or just over)
Borders change, Estonia and latvia share a common culural histroy with russia, they would be highly pissed of been lunped in with russia and what about Romania and moldova not to mention the balkans
And outside europe what about africa, look at a map of africa most of the borders are fake, obviously drawn lines of where colonies used to be and that brings one to north america probably the biggst fake of a border anywhere (USA and Canada).
And does Ireland and the UK and Australia share a common history after all most of the white man in australia came from here and the uk. Again what about the USA most of the white man there are europeans
we have a common history culturaly and otherwise, is the usa or austrailia part of our nation