The traditional autonomy of Foreign Policy has also been challenged by the rise of what are known as non-governmental organisations - often referred to in shorthand as NGOs.

Where once, there were a few hundred, now there are thousands working across the world. Good examples are aid organisations, such as Oxfam or Save the Children, or the human rights organisation Amnesty International.

While individual governments cannot control what these organisations do, their opinions can carry considerable weight.

When Amnesty questions a country's human rights policy, its voice is heard around the world. That's not always convenient for foreign policy. Take, for instance, the recent military campaign in Afghanistan. Amnesty was the first to raise questions about events in Mazar I Sharif, where hundreds of foreign Taleban prisoners were killed by the West's allies in the Northern Aliance.