A corporation (trust) is a group of individuals that form a voluntary, contractual association, or trust, under a fictional name in order to be recognized as a single legal entity (typically for limited liability of the corporation’s shareholders).
The purpose of the corporation (whether business, religious, political, etc.) and the terms between all individuals in the association are contractually spelled out in the corporation’s charter.
Under capitalism, a corporation is a group of individuals organized in a specific form (as spelled out in a corporation’s charter.). Similarly, a government is a group of individuals organized in a specific form (as spelled out in a government’s constitution.) Similarly, a marriage is a group of individuals (a man and a woman traditionally) organized in a specific form (as spelled out in the marriage agreement).
The basis of all such associations (whether a corporation, government, labor union, or marriage, etc.) are the inalienable right of its members to form contracts and associate with others free from private or state coercion.