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In page Switzerland:

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The Swiss Constitution of 1848, under the recent impression of the clashes of Catholic vs Protestant cantons that culminated in the Sonderbundskrieg, consciously defines a consociational state, allowing the peaceful co-existence of Catholics and Protestants.[citation needed] A 1980 initiative calling for the complete separation of church and state was rejected by 78.9% of the voters.[7] Some traditionally Protestant cantons and cities nowadays have a slight Catholic majority, because since about 1970 a steadily growing minority were not affiliated with any religious body (21.4% in Switzerland, 2012) especially in traditionally Protestant regions, such as Basel-City (42%), canton of Neuchâtel (38%), canton of Geneva (35%), canton of Vaud (26%), or Zurich city (city: >25%; canton: 23%).[8]