Of the forces that produced this decline we have comparatively little knowledge. Fenollosa's account of the social conditions of the period throws some light upon the problem. "It was," he says, "a period of crisis in Tokugawa affairs. The cleavage between the aristocratic and the plebeian strata of Japanese life, which had become placidly conscious of itself in the days of Genroku, now threatened a moral, a social, if not a political disruption. The new factors of popular education--art, prints, illustrated books, the theatre, novels, contact with the Dutch at Nagasaki--all had stimulated the spirit of inquiry and of unrest which had penetrated back in investigation to the facts of the Shogun's usurpation; which wrote new, popular histories of the national life; which gave plays and novels a semi-political aim. This deeper wave of self-consciousness on the part of the people was met by the authorities with sterner repressions. The better elements that might have drifted into improving the popular standards in pleasure and art were driven out by a strict censorship. There was thus a sort of natural, or unnatural, selection which tended to isolate and give prominence to the coarser side of the popular feeling. If the issue were squarely made between Confucius and rank demoralization, there was little resource for the commoner but to choose the latter. Thus there arose a sort of alliance between the theatre and the houses of pleasure on the one hand, and the disaffected among the literary and political agitators upon the other. Men, great men who sowed the seeds of the revolution which ripened in 1868, had to flee for asylum, not to Buddhist temples, but to the labyrinths of the Yoshiwara, where, in the care of a romantic love lavished upon them by its then highly cultivated _hetairæ_, they could print and disperse, from their hidden presses, seditious tracts which set the heart of the nation on fire. It was not the ideals of a ripe self-consciousness, such as Kiyonaga had attempted; it was a struggle of living desires against outworn conventions and hopeless tyrannies. Hence, the two phases of a new Ukioye art--its pressure outward toward fuller scientific realisms, and its frank recreations in the vulgarities of its surroundings."