We have been using fundamentally the same constitution since 1848, which was rewritten in 1867. The principles are basically the same; it is enormously stable. I would argue that we're the oldest continuous democratic federation in the world. France, Germany, Spain, Italy, and the United States all went through civil wars, breakdowns, coups d'état, but we didn't.
Our citizens have a remarkable experience of stability and change. Of course, the only area where we fall most behind is in reintegrating the essential aboriginal element into the idea of our citizenship—not dealing with aboriginal problems, which is the way we tend to think of it, but actually integrating the aboriginal idea back into the core of our idea of citizenship and democracy as a nation.