What started in 2014 as a Ukraine Crisis which turned into a "peace process" (a sequence of cease-fires and fire exchanges between Ukrainian separatists and the Ukrainian military) continuing up to the start of this year, when it turned into another full-blown crisis, which could have been turned into a permanent peace, has turned into a full-blown war - this time between Ukraine and the Russian Federation.
Had the Russian Federation limited its actions to recognizing Donetsk and Lugansk and protecting these areas from Ukraine by provision of peacekeeping forces, the conflict would have ended, regardless of whether the independence of these areas was "recognized" by the governments of the USA, the NATO countries and Ukraine, or not.
But deploying troops within a country without permission of its government is not the same as provision of peacekeeping forces on request of a country's government. It is a war against that country.
By starting a war against Ukraine, Russia has put itself in a position similar to the position of the USA and its allies in their wars in Afghanistan and Iraq - it will cause deaths and destruction and will have its costs.
Unlike the USA and their allies, which had no valid reasons for their wars whatsoever, the Russian aim is to make the Ukrainian government recognize the Russian sovereignty over Crimea and the independence of Donetsk and Lugansk, as well as to end its hostility towards the Russian Federation by its association with NATO, an anti-Russian ideological military alliance.
While such agreement between Ukraine and the Russian Federation would do no harm to Ukraine and end the hostilities between the countries and within Ukraine itself, in the context of the war, the Ukrainian government sees it as "capitulation" and a "humiliating defeat".
On the other hand, "standing up to the aggressor" makes the President of Ukraine look as a "heroic leader", and he prefers such image to "humiliation", even if it means continuation of the war and the damage to Ukraine it will cause.
The President of the Russian Federation is in a similar position, having started the war he has to achieve its objectives. Failure to do so would be seen as "defeat". And the US/NATO support for Ukraine and hostility towards the Russian Federation provide still further reasons for the need to win the war.
But unless the President of Ukraine recognizes the Russian sovereignty over Crimea and the independence of Donetsk and Lugansk, as well as ends his hostility towards the Russian Federation, thus ending the war, to win the war, the President of the Russian Federation will have to take military control of most of the country.
Taking control of a country where a significant part of the population is opposing the foreign invasion, will put the Russian Federation into a situation similar to that of the USA in Afghanistan or Iraq - a war lasting many years with heavy losses to both the sides.
And the only way to end this war at this early stage is for the President of Ukraine to abandon his heroic stance and to act as a wise leader seeking the good of his country and its people by recognizing the Russian sovereignty over Crimea and the independence of Donetsk and Lugansk, as well as ending his hostility towards the Russian Federation.
This should be done not as a "concession to Russia", but as recognition of the right of the people of Crimea, Donetsk and Lugansk to decide their future, and, as this will end the root causes of the conflict, there will be no reasons for further hostilities between the two sides, and there will be no need for Ukraine to seek protection of other countries and alliances. We made such suggestion still in 2015, and had it been acted upon, this war would not have happened.
The Russian Federation should accept this offer, remove its presence from Ukraine and help Ukraine to reconstruct the buildings destroyed by the war.