Taking over a country by military force is much harder in this age of globalised rights.
The decision on China's activities in the South China Sea undoubtedly represents a sweeping victory for the Philippines. It is, however, unenforceable.
What the Montreal Protocol has done for the ozone hole threat other international accords could do for climate change – if we all agree.
The world has global authorities for trade and security, but not for threats to the environment. It's time the natural world got its own version of the World Trade Organisation or UN Security Council.
The ‘functional immunity’ granted to UN officials made good sense when the body was founded after World War II. But as its organisational functions have expanded, so has this immunity.
Few would advocate a withdrawal from the United Nations. But international law has a big impact on Britain too.
Machines that can target and kill people without human intervention or accountability pose a moral threat to the world.
Conservative MP David Davies has been telling anti-TTIP activists that a leave vote is how they can torpedo the deal.
In terms of what is achievable, any foreign policy approach that does not account for strategic and historical realities is likely to fail.
A carbon tax on airline tickets might sound like a tricky sell, but many airlines already collect a similar levy to raise funds for developing world health initiatives.
The urgent need to respond to ISIS has redefined the use of "self-defense" to include attacking a nonstate threat in another country. But what are the implications of this? change?
A UN committee has agreed with the science underpinning Falklands boundary claims, but without solving the sovereignty issue the dispute is no closer to a solution.
The next cancer breakthrough could be found in international waters – but who's in charge of the high seas?
International investors will have to comply with new rules designed to stop tax avoidance by multinational companies.
A UN panel has called on the UK and Swedish governments to ensure Julian Assange’s human rights are respected and to compensate him for his time in 'arbitrary' detention.
Settlements are illegal on occupied territory. They undermine the widely acknowledged right of Palestine to statehood. Yet Israel violates international law with near impunity.
The Paris Agreement recognizes the reality of global environmental pacts: the private sector must lead transition to low-carbon technology and civil society must keep up the pressure to act.
The British government's position is that this was a legitimate act of self-defence in a war zone. But there are other issues to examine.
The UN has repeatedly failed to hold its personnel accountable for crimes committed in the field. But there are signs that could be changing at last.
The full text of the TPP trade deal is now public and offers some worrying lessons for how TTIP could turn out.