 Several authors identify two quite distinct processes that lead to a federal political order (Friedrich 1968, Buchanan 1995, Stepan 1999 and others). Independent states may aggregate by ceding or pooling sovereign powers in certain domains for the sake of goods otherwise unattainable, such as security or economic prosperity. Such coming together federal political orders are typically arranged to constrain the center and prevent majorities from overriding a member unit. Examples include the present USA, Canada, Switzerland, and Australia. Holding together federal political orders develop from unitary states, as governments devolve authority to alleviate threats of unrest or secession by territorially clustered minorities. Such federal political orders often grant some member units particular domains of sovereignty e.g. over language and cultural rights in an asymmetric federation, while maintaining broad scope of action for the central government and majorities. Examples include India, Belgium and Spain.