Western researchers have devoted little attention to legislatures in communist states. The reason being that there are not significant bodies of political socialisation when compared to legislatures in liberal democracies. While political leaders are often elected as members of socialist legislatures, these post are not relevant to political advancement. The role of legislatures is different from country to country. In the Soviet Union, the Supreme Soviet did "little more than listen to statements from Soviet political leaders and to legitimate decisions already made elsewhere" while in the legislatures of Poland, Vietnam and Yugoslavia it has been more active and had an impact on rule-making.