How would you design the city of the future?

I would like to design a city where human interaction is very good. Where everyone lives for each other. They are always helping each other. Where people stay like one big family. Nobody hates anyone, nobody is trying to pull the other person down. It will be a comfortable place for people. It’s not the city where people will live to fulfill their dreams instead it will be the city where people can live happily and freely without any worry.