According to HowStuffWorks.com, walruses can sleep and swim at the same time, too. While in the water, walruses can choose between sleeping underwater or above. A walrus can hold its breath for five minutes, just enough time for a nap. For a deeper sleep, walruses inflate spaces inside their body, called pharyngeal pouches, with up to 13 gallons of air.
Jeremy Bentham introduced the principle of utilitarianism to the penal system. He suggested that the penal system should ensure that the punishment causes more pain to the criminal than the pleasure they derived from the crime. The situation would, in turn, deter the individual from future participation in the crime.
Notable individuals whose ideas have contributed to classical liberalism include John Locke, Jean-Baptiste Say, Thomas Malthus, and David Ricardo.eo-classical liberalism has continued into the contemporary era, with writers such as John Rawls. The evolution from classical to social/welfare liberalism is reflected in Britain in, for example, the evolution of the thought of John Maynard Keynes.