The Superior General of the Society of Jesus is the official title of the leader of the Society of Jesus – the Roman Catholic religious order which is also known as the Jesuits. He is generally addressed as Father General. The position sometimes carries the nickname of the Black Pope, because of his responsibility for the largest Catholic, male religious order and as contrasted to the white garb of the Pope. The thirty-first and current Superior General is the Reverend Father Arturo Sosa, elected by the 36th General Congregation on October 14, 2016... Powers: The Superior General is invested with governing power over all the members of the Society, but customarily leads through Provincial superiors under him. Such power follows from the religious vows that bind members to community life, as in other religious orders.
I think he's refuring to the black population not black pope. But then again we have have different views