 Additionally, passages of texts by authors such as Benito Pérez Galdós have been considered naturalistic, but that has been explicitly rejected by the majority of literary critics.The line between Spanish Naturalism and Realism is difficult to distinguish due to the infrequent adoption of explicit theories among Spanish artists.In Spain, the best literary fruit of the second half of the 19th century was the novel, a consequence of the international blossoming of the genre as an expression of the middle class's rising political power, obtained through successive revolutions (1789, 1820, 1830, 1848).