Electricity was at first used primarily for lighting and gradually found more broadly-based applications as a power source. By 1896, the number of electricity companies established throughout the nation reached a total of 33, and the number of electric lights with a power supply increased to 120,000.
Happiness: According to Aristotle, happiness is the only end or good that we desire for its own sake, and it is for the sake of happiness that we desire all other ends or goods.appiness, as the ethical end, does not simply consist in moral virtue, however, but includes intellectual virtue as well, and complete happiness is a contemplative as well as a practical activity. Yet, Aristotle does not exclude all of the common-sense notions of happiness.
The main accounts of happiness in this sense are hedonism, the life satisfaction theory, and the emotional state theory. Leaving verbal questions behind, we find that happiness in the psychological sense has always been an important concern of philosophers.