Macroeconomic policy co-ordination, international trade and North-South relations have been of concern to the G7/G8 from the beginning. East-West economic issues, energy and terrorism have also been recurrent preoccupations. Later additions have included microeconomic topics such as employment and the global information infrastructure; other global, transnational issues such as the environment, crime, drugs, and AIDS; and political and security issues such as human rights, migration, regional security, arms control, terrorism, and nuclear safety.