Finding a fundamental principle of democratic inclusion: related, not affected or subjected

The question of who should be included in democratic decision-making is known as the boundary problem in democratic theory. I identify two requirements that a satisfactory solution to the boundary problem must satisfy, i.e. the Considered Judgment Requirement and the Value Requirement. I argue that the two most prominent solutions to the boundary problem—the all-affected principle and the all-subjected principle—fail to satisfy these requirements. Instead, I propose an equal relations principle and show that it satisfies the requirements. It turns out that relatedness, and not affectedness or subjectedness, is what fundamentally explains who should be included.