write about what you consider to be the most significant change in the nature of diplomacy

Diplomacy is "the application of intelligence and tact to the conduct of official relations between the government of independent states" (Satow 2009:3). diplomacy, claims Leguey-Feilleux is as old as civilisation and it adapts to the currant international society (2009:23). i think World War One was the beginning of the mains changes that have taken place in diplomatic relations because it emphasized the need for transparency and multilateralism within the processes of diplomacy. indeed, the traditional diplomacy failed to prevent the conflict that destabilized the world by the simple use of dialogue and negotiation. Instead favoured "mutual agreement" therefore "limiting the relationship to two parties, of course made easier to keep negotiations secret" (White 2005:390). This secrecy was against the goal of obtaining stability and peace since it caused a world war. Thus, the war highlighted problems within the old processes and a open the horizon for change.
The changes required for a more effective diplomacy implied "public scrutiny and control" (White 2005:391) and a "new diplomacy" emerged.
Firstly, an open diplomacy where the public will be informed of any reached agreements is one of the mains changes for the simple reason that diplomacy is not anymore limited to a "closed social elite" but this also means that the states have to be careful in their choices and alliances they do not want to be seen as weak or too aggressive. Furthermore, the creation of institutions like the League of Nations and Later the United Nations is also a significant transformation since it favours cooperation and gives a certain power to this international organization because its role would be to foster and regulate the exchange between states. Finally, the changes meant that non states actors also have important role to play in diplomacy since security was no longer the only issues that affected the diplomacy's agenda but social and economic problems were becoming and sometimes were taking over the security concern.