a gap in national historiography regarding Spain's decline. The opening of the text introduces the author's motivations for writing this work, highlighting the lack of serious historical analysis of Spain’s decline since the 17th century. Cánovas del Castillo expresses his intention to offer a comprehensive narrative that challenges the prevailing foreign accounts which, he believes, have misrepresented Spain's history. He emphasizes the importance of utilizing original Spanish sources rather than relying on translations or secondary interpretations, setting the stage for a detailed exploration of the political dynamics and historical events of the time. The early chapters reflect a youthful enthusiasm blended with an earnest desire to contribute meaningfully to the understanding of Spain’s historical trajectory. (This is an automatically generated summary.)