OTTAWA — A human rights group and a band of MPs issued a “wake-up call” Tuesday to Canada and other countries to help stop the genocide in Darfur, warning that the worst of the atrocities may still be ahead. Irwin Cotler, a former Liberal MP and cabinet minister and now a human rights advocate, said Canada and its international allies need to do more to pursue peace in the western Sudanese region, help citizens evade the war zones through safe corridors, and provide other forms of humanitarian assistance. Cotler, a key member of a “Save Darfur” coalition of MPs that was founded 22...