Much has been said of the onerous burdens of taxation endured by individuals compared with those of corporations, and especially corporations enjoying certain rights or franchises in public streets and highways or corporations of a more or less public character. The phenomenal growth of municipalities has been one of the notable social movements of the last twenty-five years. The drift of population from the country districts to cities has increased with each year, and finds an explanation in many causes. The opportunities offered in a city for advancement are greater and more numerous; the monotony of the farm life does not keep the young at home, but drives them for excitement and profit to the great centers of population. The economic changes of a half century also have their influence. The competition of new regions, better adapted for certain cultures on a commercial scale, has reduced the profitableness of older and more settled localities, where comparatively costly methods must be resorted to if the fertility of the land is to be maintained. The wheat fields of the West narrowed the margin of profit in New England farming, while the sheep and cattle ranges of the West made it impossible for the same quality of live stock to be raised for profit in the East. Farms were abandoned, and the younger blood went West to grow up with the country, or into the cities to struggle for a living. Further, the advances in agriculture, the application of more productive methods, and the introduction of machinery have reduced the demand for labor in the rural districts, and this has led to a migration to the cities. The result of this has been an immense development of city life, and with it an ever-increasing field for investment in corporate activities. The supply of water is usually in the city's control, but the manufacture and sale of gas, the production and distribution of electricity, the street railways, telegraph, and telephone interests are private corporations formed for profit and using more or less the public highways in the conduct of their various enterprises. A grant of a street or highway for a railway or electric-wire subway generally involves a monopoly of that use, and the privilege or franchise may become more valuable with the mere growth in the population of the cities. Assured against an immediate competition, there is a steady increment in the value of the franchise, and in the case of a true monopoly there seems to be no limits to its possible growth.