U.S. missile defense in the twenty-first century is focused on emerging threats from North Korea and Iran, but critics say these systems are too costly and largely unproven.

Sen. John McCain’s Republican presidential campaign has a group of foreign policy advisers reflecting both realist and neoconservative views of the world.

Nationalism in China, surging amid protests over Beijing’s rule in Tibet, increasingly fills the role Maoism played before China embraced capitalism.

The election of pope to lead the world’s one billion Catholics stirs debate over the spiritual authority of the pontiff and the church’s role in the world.