EU's members support the extension of majority voting in principle.

ECONOMIST: The Union��s tricky treaty

"The cause of reform, so long fought for, cannot afford to have the fundamentally fair and historic principle of majority voting cast aside, " the historians write.

BBC: AV referendum: Union stance 'depressing', says Johnson

And yes, for all the talk of principle, many Tories might just be voting for electoral self-interest rather than an enthusiasm for improving democracy.

BBC: Boundaries: a running sore?

In addition, the election is being held in violation of the Principle Chiefs Act, which requires a Cherokee leadership to submit its voting requirements to the Department of Interior.

NPR: Cherokee Nation Faces New Battle

The Good Friday Agreement settled the dispute between London and Dublin about sovereignty, with both governments and the major political parties recognising the "principle of consent", namely that it's up to the will of the majority voting in a referendum whether Northern Ireland remains in the UK or becomes part of Ireland.

BBC: Northern Ireland