Feminist anthropology is a four field approach to anthropology (archeological, biological, cultural, linguistic) that seeks to reduce male bias in research findings, anthropological hiring practices, and the scholarly production of knowledge. Anthropology engages often with feminists from non-Western traditions, whose perspectives and experiences can differ from those of white European and American feminists. Historically, such 'peripheral' perspectives have sometimes been marginalized and regarded as less valid or important than knowledge from the western world. Feminist anthropologists have claimed that their research helps to correct this systematic bias in mainstream feminist theory. Feminist anthropologists are centrally concerned with the construction of gender across societies. Feminist anthropology is inclusive of birth anthropology as a specialization.