Often though philanthropists forget this, diagnosis should precede treatment. The evils of the city, by the very nature of our hypothesis, demand special survey, and this no less thoroughly than do the normal place and work and industry. It is only our most permanent intellectual impulse, that of seeking for unity, which excuses the cheap unitary explanations so often current; as, for instance, that social evils are mainly to be explained by intemperance, as for one school of reformers; by poverty or luxury, for a second and third; by Tammany or other form of party government, by socialism or by individualism for yet others; that they are due to dissent or to church, to ignorance or to the spread of science, and so on almost indefinitely--doubtless not without elements of truth in each! Yet let me offer as yet another explanation of civic evils, this more general one--distinguished from the preceding by including them all and more--that not only is our "Town" in itself imperfect, but the other three elements we have been characterising as school, cloister and city, are yet more imperfect, since disordered, decayed, or undeveloped anew. It is because of each and all of these imperfect realisations of our civic life, that the evils of life sink down, or flame out, into these complex eruptions of social evils with which our human aggregations are as yet cursed. Hence, to those who are struggling with disease and pain, with ignorance and defect, with vice, and with crime, but for the most part too separately, it is time to say that all these four evils are capable of being viewed together, and largely even treated together. They are not unrelated, but correspond each as the negative to that fourfold presentment of ideals we have hitherto been raising. To this ideal unity of healthy town, with its practical and scientific schools of all kinds, with its meditative cloister of ethical and social idealism, of unified science and philosophy, of imagination and drama, all culminating in the polity, culture, and art which make a city proper, we have here the corresponding defects in detail.