An intentional community is a planned residential community designed to have a much higher degree of teamwork than other communities. The members of an intentional community typically hold a common social, political, religious, or spiritual vision and are often part of the alternative society. They typically also share responsibilities and resources. Intentional communities include cohousing communities, residential land trusts, ecovillages, communes, survivalist retreats, kibbutzim, ashrams and housing cooperatives. Typically, new members of an intentional community are selected by the community's existing membership, rather than by real-estate agents or land owners (if the land is not owned collectively by the community). Intentional communities do not claim to be utopias, but many do draw on historical utopian experiments, and ideas in utopian fiction.