Why a demanding rule can make membership more credible
A group is easier to rely on when its members have reason to stay involved. Shared rules can help create that reliability—not because uncomfortable clothing or restricted food automatically makes someone trustworthy, but because following a rule can carry a real personal cost.
In economics, this is a costly signal: an action that is more persuasive when it takes effort or sacrifice. Saying “I’m committed” is easy; repeatedly accepting a constraint is harder. If the rule is known in advance and applies to members, a newcomer’s willingness to follow it can offer evidence that they value belonging enough to bear its costs.
The payoff is mutual confidence
That evidence can make cooperation less uncertain. Members may be more willing to share work, resources, or responsibility when they believe others are similarly invested. A common rule also gives people a visible standard: members can recognize who is participating, and newcomers can see what joining entails.
The rule does not prove anyone’s motives, and it may screen for tolerance of the rule rather than commitment to every group goal. Its effect depends on the setting: a demand that members consider meaningful may be a pointless burden to outsiders.
Screening has a price
A demanding boundary can strengthen trust among those inside while keeping capable people out—especially people who cannot afford the time, money, or discomfort it requires. The group trades a smaller, more evidently committed membership for a narrower path in. That is why the same rule can feel like a bond to insiders and an unnecessary barrier to everyone else.
