The document summarizes the key events and factors that contributed to the development of Philippine nationalism in the 19th century. Mexico's independence in 1821 and the opening of the Philippines to world trade in 1834 exposed Filipinos to liberal ideas from Europe and America. The secularization movement, Cavite Mutiny of 1872, and martyrdom of GomBurZa further fueled nationalist sentiments. Prominent propagandists like Rizal, del Pilar, and Lopez Jaena established organizations like La Solidaridad and La Liga Filipina to advocate for reforms, though this failed and led to Bonifacio founding the Katipunan movement.