United National Party in the context of "International Democracy Union"

Socialism has been mentioned in several liberal democratic constitutions. It is referenced either in the form of denunciation (as is the case in the Croatian, Hungarian and Polish constitutions) or in form of construction, namely that the constitution of the state in question proclaim that it seeks to establish a socialist society (Bangladesh, India, Guyana and Portugal being examples). In these cases, the intended meaning of the term socialism can vary widely and sometimes the constitutional references to socialism are left over from a previous period in the country's history.

With the exceptions of Bangladesh, India, Guyana, Portugal, and Sri Lanka, references to socialism were introduced by Marxist–Leninist communist parties (sometimes in collaboration with more moderate socialist parties). In India, it is used in relation to secularism. In Sri Lanka, socialist terms were introduced by the United National Party. Tanzania considers itself to be a socialist state, having previously been a one-party state led by the Party of the Revolution (which has been in power since independence). Croatia, Hungary and Poland have references to socialism in the form of rejection of their own past communist state.