English contract law is a body of law regulating contracts in England and Wales. With its roots in the lex mercatoria and the activism of the judiciary during the industrial revolution, it shares a heritage with countries across the Commonwealth (such as Australia, Canada, India), and the United States. It is also experiencing gradual change because of the UK's membership of the European Union and international organisations like Unidroit. Any agreement that is enforceable in court is a contract. Because a contract is a voluntary obligation, in contrast to paying compensation for a tort and restitution to reverse unjust enrichment, English law places a high value on ensuring people have truly consented to the deals that bind them in court.