James died in 1625, succeeded by his son, Charles I, who proved an incompetent ruler.
Charles I proved to be a spectacular ruler in all respects after inheriting the crown in 1625 from his father. 
mnli hypothesis: Charles I proved to be a spectacular ruler in all respects after inheriting the crown in 1625 from his father.  premise: James died in 1625, succeeded by his son, Charles I, who proved an incompetent ruler.