The title seems to refer to all these walls built by rich countries to prevent the entry of those on the other side. This wall is different, it consists of dollars held together by a gold mortar. It limits those who are on this side, making any relationship with the others impossible. However, they do not complain: they live in well-being, have money, power, success and can enjoy the material benefits and psychological that flow from it. Convinced of needing nothing else, even less someone else. If they are not happy, it is because - they think - happiness does not exist. They are wrong: happiness exists. And in order to reach it, they must not give up their well-being, but only improve their relationships with themselves and with the people they love (the others).