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Concept
Cleanliness
Summary
Cleanliness is both the state of being clean and free from germs, dirt, trash, or waste, and the habit of achieving and maintaining that state. Cleanliness is often achieved through cleaning. Culturally, cleanliness is usually a good quality, as indicated by the aphorism: "Cleanliness is next to Godliness", and may be regarded as contributing to other ideals such as health and beauty.
The concept of cleanliness emphasizes an ongoing procedure or set of habits for the purpose of maintenance and prevention. In this it differs from , which is a physical, moral, or ritual state of freedom from pollutants. Whereas purity is usually a quality of an individual or substance, cleanliness has a social dimension or implies a . "Cleanliness", observed Jacob Burckhardt, "is indispensable to our modern notion of social perfection". A household or workplace may be said to exhibit cleanliness, but ordinarily not purity. Cleanliness is also a characteristic of people who maintain cleanness or prevent dirtying.
Cleanliness is related to hygiene and disease prevention. Washing is one way of achieving physical cleanliness, usually with water and often some kind of soap or detergent. Cleaning procedures are also important in many forms of manufacturing.
As an assertion of moral superiority or respectability, cleanliness has played a role in establishing cultural values in relation to social class, humanitarianism, and cultural imperialism.
Hygiene
Since the germ theory of disease, cleanliness has come to mean an effort to remove germs and other hazardous materials. A reaction to an excessive desire for a germ-free environment began around 1989, when David Strachan put forth the "hygiene hypothesis" in the British Medical Journal. This hypothesis holds that environmental microbes help develop the human immune system; the fewer germs people are exposed to in early childhood, the more likely they are to experience certain health problems in childhood and as adults. However, the valuation of cleanliness also has a social and cultural dimension beyond the requirements of hygiene for practical purposes.
Official source
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