Electrical power began to serve American industry, cities, and homes in the 1880s and for many years was regarded by most as a luxury and a curiosity. By the 1920s, however, largely (but not entirely) through the efforts of private industry, more than half of all urban homes had electric lights and a sizeable minority had a wide range of electrical appliances. Electric power, with its associated conveniences and efficiencies, became regarded as an essential element of modern life. Since bringing power to rural areas was more expensive, however, less than ten percent of farm families had electricity. Increasingly, this disparity between cities and the countryside was seen as unfair and a threat to the American social fabric.