sentences:  In these lectures, Ruskin spoke about how to acquire art, and how to use it, arguing that England had forgotten that true wealth is virtue, and that art is an index of a nation's well-being.Individuals have a responsibility to consume wisely, stimulating beneficent demand.The increasingly critical tone and political nature of Ruskin's interventions outraged his father and the "Manchester School" of economists, as represented by a hostile review in the "Manchester Examiner and Times".