The political activity of the Catholic Church on LGBT issues mainly consists of efforts made by the Catholic Church to support or oppose civil government legislation on issues of importance to LGBT people. The Church generally condemns all forms of violence against gay and lesbian people. However, the Church in certain countries has occasionally resisted efforts to decriminalize homosexuality or to introduce measures to tackle discrimination. The Catholic Church also supports legally defining marriage in civil legislation as the union of one man and one woman, therefore generally opposing efforts to introduce gay civil unions and gay marriage – although some clergymen have expressed support for same-sex unions. The Church teaches that not all discrimination is "unjust," and that discrimina