A leading Republican candidate for president, Sen. John McCain, tells CFR.org the country needs to unite over issues ranging from Iraq to immigration.

The United States continues to pursue peace talks with Afghanistan’s Taliban as a means to secure stability. Bruce Riedel discusses the challenges faced by the administration, including its ongoing t…

The Republican presidential candidates are aligned on most foreign policy issues, but they could quarrel over immigration and the Iran nuclear deal in their first debate, says CFR’s James M. Lindsay…

The pope’s encyclical on the environment carries a profoundly religious message about care for the earth, wedded to a new call for activism, say religious scholars Mary Evelyn Tucker and John Grim.

The surprise resignation of Pope Benedict XVI has given rise to speculations that the next pontiff to lead the Catholic Church will hail from the developing world, says expert James P. McCartin.