The growing number of Protestants, Evangelicals and Word of God Catholics challenging traditional authority has caused religious strife in a number of indigenous communities. Tensions have been strong, at times, especially in rural areas such as San Juan Chamula. Tension among the groups reached its peak in the 1990s with a large number of people injured during open clashes. In the 1970s, caciques began to expel dissidents from their communities for challenging their power, initially with the use of violence. By 2000, more than 20,000 people had been displaced, but state and federal authorities did not act to stop the expulsions. Today, the situation has quieted but the tension remains, especially in very isolated communities.