If a group of construction workers has enough resources only for one house, and each construction worker is following their own architectural plan, then they will certainly fail to build a house. For a group of construction workers to build a proper house, they must all follow the same architectural plan. Any construction worker who is not following the same plan as the rest of the group, would just be wasting precious resources and making a mess. Similarly, if everyone interested in solving a large-scale problem is following their own plan, then no plan will succeed. There is a limited amount of people who care about solving a particular large-scale problem; And the amounts of time, effort, and money those people are willing to spend are limited resources, and the amount of them spent in one place, is the amount of them not spent in another place. Furthermore, a combination of two things can produce a result that is greater than the sum of results that they can produce individually. In physics, this concept is known as synergy. But this doesn’t mean that an organization for solving a large-scale problem should accept everyone who claims to share its goal. There is no strength in numbers without unity. For those of us that don’t have a great amount of available force or financial power to make people agree with us, a high degree of unity can only be achieved in truth. It is therefore necessary, for any organization that seeks to solve a large-scale problem, to insist on unity in truth as one of its core values. It’s not possible to meaningfully organize with people who are not willing to go where reason leads. If someone says "I am doing A, you can join or not, but I am not gonna reason with people who think B or C are better." then it is necessary to leave them out, and work with people who are willing to stick to reason. Unity in truth doesn’t mean that members of the organization should always speak the truth to outsiders. It means that members should be honest with each other. It means that all members should follow one, same plan. And it means the leader should occasionally modify the plan, in accordance with reason, based on suggestions made to him by members with the “plan refiner” role, after they have finished discussing those suggestions with each other.