I believe it would be ghosts, and the dead. According to some resources, he had contact with the dead and it frightened him
Hope this helps!!
When one group or individual controls all three powers abuse of power arises, bringing a decline in the rights and liberties of the citizens. Only true Democracy, through the appropriate implementation of the separation of powers represents a guarantee of said liberties for the citizens. In this way, no power or institution becomes more important than the others.
Thomas believed that the most important form of government was to have a king.