These are often deliberate attempts to create a different kind of society. They are a living proof of that possibility and a source of learning about how to build a culture of peace. For example, members of peace communities such as the Brüderhof withdraw from the rest of society and practice voluntary poverty, hold no private property, and use any surplus income for humanitarian purposes. The worldwide Bahá'í community, although not living in communes, is known for its unity of purpose, thought and action in service to humanity. In both cases, their culture of peace is not an inherited trait, but is a fruit of mindful determination and everyday sacrifices to build a more humane, peaceful society.