Will really a sunk ship lead to a new war between the Two Koreas?

Everything started in 1945 with the end of Japanese colonial rule and later with the USA influence in South Korea (ROK) and with the Russian influence in North Korea (DPRK). The purpose of this book is not to deal with only similar conflicts but, the new re-consolidation of military relationship between DPRK and China, the psychological warfare, the nuclear talks seen as the output of DPRK withdrawing in 2003 from the NPT (Nuclear Non Proliferation Treaty) are some of the issues treated. The evident and huge differences between the Two Koreas lead several inter-korean relations scholars and people to fear a new war (after the famous one from 1950 to 1953) especially after the incident of the ship in 2010. South Korean actions such as the tax for reunification (ROK has even a Ministry for unification!) and the food aid to the North make to hope well but unfortunately an official peace treaty was never signed so far and the two Koreas have technically been at war since 1950 and a result is that a small country like DPRK is still playing such an important role within the international exchequer and therefore the entire global security.