For many policymakers, economic sanctions have become the tool of choice to respond to major geopolitical challenges such as terrorism and conflict.

Brexit supporters argue that the EU threatens sovereignty and stifles growth, while opponents counter that EU membership strengthens trade, investment, and the UK’s standing in the world.

China’s industrial policy is aimed at rapidly expanding its high-tech sectors and developing its advanced manufacturing base. The plan is seen as a threat by President Trump, and could escalate the trade war.

With economic inequality at an all-time high, some U.S. presidential candidates are proposing dramatic shifts to the U.S. tax code. How have similar plans worked elsewhere in the world?