Corporations are not 'people' as in 'natural persons', but they are 'persons', as in 'juridical person' -- as are trusts, estates, and other institutions.

Trusts etc. are mechanisms to move inheritance from personal law into corporate law. This lets you game the system as corporate privilege often handles this more gracefully than personal privilege(wills and inheritance).

Probably want to contact a lawyer for the nuances, but the thousand foot view is you create a corporation with yourself as chief officer, and others as backup officers. set your corporate law to make your backup officers useless until the death of the chief officer and strict guidelines as to how the backup officers are to manage corporate assets. then finally transfer assets to the corporation.

The point being, the thing that makes a corporation a corporation is its corporate law governing its members, thus the assertion that corporations are not people, they are governments.