to date no nation can provide decent living standards at sustainable levels of energy and resource use. They provide analysis about factors in social provisioning and assess that improving beneficial provisioning-factors and infrastructure would allow for sustainable forms of sufficient need satisfaction. Characteristics A public service may sometimes have the characteristics of a public good (being non-rivalrous and non-excludable), but most are services which may (according to prevailing social norms) be under-provided by the market. In most cases public services are services, i.e. they do not involve manufacturing of goods. They may be provided by local or national monopolies, especially in sectors that are natural monopolies. They may involve outputs that are hard to attribute to specific individual effort or hard to measure in terms of key characteristics such as quality. They often require high levels of training and education. They may attract people with a public service ethos who wish to give something to the wider public or community through their work. The process of assessing the needs of the people of an area, and then designing and securing an appropriate public service to meet those needs, is often referred to in the UK as commissioning. The commissioned services may be delivered by organisations in the public sector, private sector or third sector: when the private or third sector is involved the process of commissioning will usually be linked with a process of procurement, to determine who will provide the services, at what cost and on what terms. Commissioning is often seen as a cyclical process. History Governing bodies have long provided core public services. The tradition of keeping citizens secure through organized military defence dates to at least four thousand years ago. Maintaining order through local delegated authority originated at least as early as the Warring States period (5th to 3rd centuries BCE) in ancient China with the institution of (prefectures) under the control of a centrally appointed prefect. Historical evidence of state provision of dispute resolution through a legal/justice system goes back at least as far as ancient Egypt. A primary public service in ancient history involved ensuring the general favor of the gods through a theologically and ceremonially correct state religion. The widespread provision of public utilities as public services in developed countries usually began in the late nineteenth century, often with the municipal development of gas and water services. Later, governments began to provide other