Most importantly, it is the main global forum for discussing international political cooperation, threats to peace and economic development, as well as the huge range of social, humanitarian and cultural issues that come under the remit of the United Nations.
All the soldiers and intelligence officers in France could not have stopped the attacker getting on that train without foreign cooperation, but threats can move quicker within a borderless EU than the EU can react.
Governments have replaced talk of closer cooperation with threats of a more visible separation, warning that they are considering blocking off their borders in a region meant to be growing closer under the EU, not pulling apart.
Over time, the summit could come to look more significant if the two sides follow through with steps to tighten cooperation against threats from Iran and terrorist groups, said Brian Katulis, a Mideast specialist at the Center for American Progress, a think tank with close ties to the Obama administration.
Unfortunately, in a situation where we most need solidarity and well-functioning European cooperation, the threats to the European idea are also growing.
The result of the above argument concerns the network is sustained by only one pair cooperation under the threat of 'If you cooperate with the third player, then I will do the same'.
Cinyabuguma, M., Page, T. & Putterman, L. Cooperation under the threat of expulsion in a public goods experiment.
We add to the recent work on identifying network architectures that sustain cooperation via the threat of exclusion by showing that the utility specification matters.
We are committed to intensifying cooperation against this threat, which will bolster both the security and health of the citizens of our countries.
In addition, we find evidence for a technology mechanism: co-ethnics are more closely linked on social networks and thus plausibly better able to support cooperation through the threat of social sanction.
China's U.N ambassador, Guangya Wang, said that compelling Syria's cooperation through the threat of sanctions is unnecessary because Syria has publicly agreed to cooperate.
