New diplomacy, what's the most important aspect?

In the matters of diplomacy, every tool has its importance and each of them play a significant role in achieving the state's objectives. However, there are key features of the "New " diplomacy that enable better accomplishment of these goals and i find myself favoring public diplomacy as the most prominent aspect. The aims of conventional diplomacy is to directly influence foreign governments but public diplomacy exerts even more influence by appealing to foreign public who in return indirectly influence their governments. The spread of democracy particularly has increased the political importance of public opinion and we can see how much impact it has on public policies today with the help of the media and rapid means of communication (Berridge,2010,182). Another important aspect of "New" diplomacy is the introduction of non-state actors. The end of the bipolar system brought in an increase in global actors, more participants outside foreign ministries and even economic diplomacy where governments are seeking investment flows and giving development assistance to deprived communities. The principle of "only states and their entities have the right diplomatic representation" ended and Non-governmental organisations even inervene in crises beyond the control of governments. The strength of NGOs resides in the fact that they represent a vast number of people with different level of influence on the public, such as celebrities and they have access to certain regions where certain states fail to gain trust from the people. Via these two great tools of the "New" diplomacy, better things can be accomplished in terms of international relations.

G.R. Berridge,Diplomacy: theory and practices,4th edition