Political culture describes how culture impacts politics. Every political system is embedded in a particular political culture. Gabriel Almond defines it as "the particular pattern of orientations toward political actions in which every political system is embedded". Lucian Pye's definition is that "Political culture is the set of attitudes, beliefs, and sentiments, which give order and meaning to a political process and which provide the underlying assumptions and rules that govern behavior in the political system". María Eugenia Vázquez Semadeni defines political culture as "the set of discourses and symbolic practices by means of which both individuals and groups articulate their relationship to power, elaborate their political demands and put them at stake." The limits of a particular political culture are based on subjective identity. The most common form of such identity today is the national identity, and hence nation states set the typical limits of political cultures. The socio-cultural system, in turn, gives meaning to a political culture through shared symbols and rituals (such as a national independence day) which reflect common values. This may develop into a civil religion. The values themselves can be more hierarchical or egalitarian, and will set the limits to political participation, thereby creating a basis for legitimacy. They are transmitted through socialization, and shaped by shared historical experiences which form the collective or national memory. Intellectuals will continue to interpret the political culture through political discourse in the public sphere. Indeed, elite political culture is more consequential than mass-level. Trust is a major factor in political culture, as its level determines the capacity of the state to function. Postmaterialism is the degree to which political culture is concerned with issues which are not of immediate physical or material concern, such as human rights and environmentalism. Religion has also an impact on political culture.