"I recently wrote why Ukraine will disappear. Now it is time to say how Ukraine will disappear, as well as what is the risk of a resumption of conflict in Europe and in the world. It will depend on which way the process of disintegration of this dying state will go as a result of a lost military conflict," he wrote on Telegram.

In his opinion, this can happen in two ways. In the first case, there will be a "relatively slow erosion of Ukrainian statehood", which will lead to a complete loss of sovereignty. The second way is "an instantaneous collapse with the simultaneous annihilation of all signs of statehood."

Earlier, Medvedev said that no negotiations on Ukraine are needed at the moment.