Sealand is what humanity can achieve
Every society is different. They each have their own customs, habits and way of life. In the Chrysalids there are many unique societies, each and everyone different, particularly the Waknuk and Sealand societies. The Waknuk society is packed with problems humanity has strived to leave behind. Meanwhile, the society in Sealand has overcome these problems. They treat every person and thing equally, putting aside things the Waknuk society would have deemed "deviations" or "offences." As a result of putting aside these problems, the Sealand people have managed to create a technologically advanced city by working together. The society in Sealand is what humanity can achieve if we overcome our primitive thinking and beliefs.
Discrimination is a huge part of what makes Waknuk society so intolerant. They believe that everything should abide by the "True Image of God" (Wyndham 17-20). An extremely biased opinion, where everything should be one way and anything different is considered a deviation and must be banished or destroyed. This results in many people being exiled to the Fringes and animals and livestock destroyed, leading to a fear of being or having deviants or offences. This is also the main problem that David and his friends have, as they are considered deviants because of their ability. Sealand however completely has this flipped. "'The kind of people that God intended, perhaps?' . . . 'I don't know about that. Who Does (156)?'" The Sealand people do not have a "True Image". Instead, the Sealand people value telepathy or think-pictures(145), an ability or gift that David's group has, unlike Waknuk. The Sealand women consider Waknuk primitive and the Fringes as savages (156). The Sealand people's believed that their gift is essential in life. They believed that there is a barrier between people who could and could not think together. They consider telepathy a part of natural evolution, contrary to Waknuk belief. Being able to think together creates many benefits. Large scale projects become much easier, wars are less likely as everyone is constantly sharing their thoughts and technological advancements are rapidly improving as people can share their knowledge and thoughts with ease. The Sealand people do one thing extremely well that can solve numerous problems all over the world. They communicate.