Rizal published his work "Indolence of the Filipinos" in five installments in La Solidaridad from July to September 1890. In it, he admits that indolence exists among Filipinos but argues one must study the causes before proposing solutions. He identifies several historical factors that may have led to cultural and economic problems for Filipinos, including wars, forced labor, lack of trade encouragement, abuse of power, and limited education. Overall, Rizal asserts the main causes of perceived Filipino indolence are the limited training and education received by natives and the absence of a sense of national unity.