In contrast, in several European countries (e.g. Belgium, Denmark, the Netherlands and Switzerland), religious unions have existed for decades. These unions typically distanced themselves from some of the doctrines of orthodox Marxism, such as the preference of atheism and from rhetoric suggesting that employees' interests always are in conflict with those of employers. Some of these Christian unions have had some ties to centrist or conservative political movements and some do not regard strikes as acceptable political means for achieving employees' goals. In Poland, the biggest trade union Solidarity emerged as an anti-communist movement with religious nationalist overtones and today it supports the right-wing Law and Justice party.