How to choose a delegation for a peace conference

This paper analyzes how to choose a delegation, a committee to represent a society such as in a peace conference. We propose normative conditions and seek optimal, consistent, neutral and non-manipulable ways to choose a delegation. We show that a novel class of threshold rules are characterized by these criteria. The rules impose that a delegation is chosen when its combined support in the society first reaches a particular percentage of the public opinion - depending on the size of the delegation. Conversely, minority opinions that are not reflected in the delegation should always be below a threshold, which follows a geometric series.