Rafael Altamira,
A History of Spain
“ It appears, therefore, that the empire was more a matter of show than of strength, and that Spain, who already had a surfeit of responsibility, what with her conquests in Italy, Africa, and the Americas, must bear the burden for all. The reign of Charles would seem to be the parting of the ways for Spain. If she could have restricted herself to her purely Spanish inheritance, even with the incubus of her Italian possessions, she might have prolonged her existence as a great power indefinitely. ”
