Some analytic philosophers at the end of the 20th century, such as Richard Rorty, have called for a major overhaul of the analytic philosophic tradition. In particular, Rorty has argued that analytic philosophers must learn important lessons from the work of continental philosophers. Some authors, such as Paul M. Livingston and Shaun Gallagher contend that there exist valuable insights common to both traditions while others, such as Timothy Williamson, have called for even stricter adherence to the methodological ideals of analytic philosophy: