The local churches and the ministry of Watchman Nee and Witness Lee have been the subject of controversy in two major areas over the past fifty years. To a large extent these controversies stem from the rapid increase and spread of the local churches in the United States in the 1960s and early 1970s. In the 1970s they became a target of opposition of fledgling countercult ministries. Unsupported criticisms of anti-social behaviors led to three libel litigations. In addition, some criticized the teaching of Witness Lee on the nature of God, God's full salvation, and the church.