art, however, considers interaction with tradition as integral to the development of new artistic expression. Relationship to other concepts In the social sciences, tradition is often contrasted with modernity, particularly in terms of whole societies. This dichotomy is generally associated with a linear model of social change, in which societies progress from being traditional to being modern. Tradition-oriented societies have been characterized as valuing filial piety, harmony and group welfare, stability, and interdependence, while a society exhibiting modernity would value "individualism (with free will and choice), mobility, and progress." Another author discussing tradition in relationship to modernity, Anthony Giddens, sees tradition as something bound to ritual, where ritual guarantees the continuation of tradition. Gusfield and others, though, criticize this dichotomy as oversimplified, arguing that tradition is dynamic, heterogeneous, and coexists successfully with modernity even within individuals. Tradition should be differentiated from customs, conventions, laws, norms, routines, rules and similar concepts. Whereas tradition is supposed to be invariable, they are seen as more flexible and subject to innovation and change. Whereas justification for tradition is ideological, the justification for other similar concepts is more practical or technical. Over time, customs, routines, conventions, rules and such can evolve into traditions, but that usually requires that they stop having (primarily) a practical purpose. For example, wigs worn by lawyers were at first common and fashionable; spurs worn by military officials were at first practical but now are both impractical and traditional. Preservation The legal protection of tradition includes a number of international agreements and national laws. In addition to the fundamental protection of cultural property, there is also cooperation between the United Nations, UNESCO and Blue Shield International in the protection or recording of traditions and customs. The protection of culture and traditions is becoming increasingly important nationally and internationally. In many countries, concerted attempts are being made to preserve traditions that are at risk of being lost. A number of factors can exacerbate the loss of tradition, including industrialization, globalization, and the assimilation or marginalization of specific cultural groups. Customary celebrations and lifestyles are among the traditions that are sought to be preserved. Likewise, the concept of tradition has been used to defend the preservation and reintroduction of minority languages such as Cornish under the auspices of the European Charter for Regional or Minority Languages. Specifically, the charter holds that these languages "contribute to the maintenance and development of Europe's cultural wealth