While many Christians in the 16th century believed it was their Christian duty to always follow their monarch, Knox believed it was worse for a Christian to follow a ruler that was evil. He claimed that, if needed, a rebellion should take place to dethrone her. Many people in Scotland agreed with Knox that it was not natural for women to rule but they did not agree with his belief that the queens should be replaced. Because of Knox's bold call to action, his contemporaries began to consider Knox as a revolutionary.