There is no final goal for evolution, however system, which is more effective than system before has bigger chance to copy itself. System with bigger internal value for other people has bigger potential to spread.
Blockchain as technology of our time completely changes evidence of property rights. We used to live in centralized system of protection of property rights by police, courts and officers. This system was absolutely vulnerable to be misused by anyone, who has power to enforce unjust state of property distribution. Decentralization is first step to protect ourselves against state aggression. However, it takes too much resources to keep system decentralised and still big chance exists, that it will return centralized system again. Only key to keep system sufficient is to distribute it.