Mind you that isn't the same as the end of the jihadi cause in Syria that US is inclined to continue to prop up
The Islamic State(also known as Daesh) is the bastard child of the US's drive to achieve regime change in Syria.
To that end the US and its allies instigated an armed insurrection against the Syrian government.
Though protests — many of them violent — began in 2011, it was in 2012 — after the Geneva Peace Conference — which the US wrecked by insisting President Assad stand down — that the major fighting began, with a rebel offensive against Syria's two biggest cities: Aleppo and Damascus.
The offensive failed. The Syrian government survived, retaining control of Damascus and half of Aleppo.
Defending these cities and the populated coastal core of Syria however forced the Syrian army to withdraw from large areas of Syrian territory, most of them desert.
In 2013 the military balance shifted back to the Syrian government.
The US response was to try to use a chemical attack on the Damascus suburb of Ghouta as a pretext to bomb Syria. When that failed because of strong opposition from Russia and US public opinion it stepped up support for the insurgency.
Weapons, money and fighters poured in, and over the course of 2014 the military balance shifted back to the rebels again.
The main beneficiary was the organisation that now calls itself the Islamic State.
This began as the Iraqi branch of the global jihadi terrorist group Al-Qaeda.
It took advantage of the vacuum created by the Syrian army's withdrawal from Syria's desert regions to expand into Syria and to establish itself there.
As the best organised, most violent and most militant of the jihadi groups that form the core of the Syrian rebellion, it quickly achieved predominance especially as it focused on seizing territory rather than fighting the Syrian army.
In 2014 it went on the offensive in Iraq, seizing the important city of Mosul.
Shortly after it declared itself the Islamic State and proclaimed its leader — the man known as Ibrahim Abu Bakr Al-Baghdadi — Islam's Caliph.
The Islamic State is said to have a Wahhabist or Salafist ideology, like those in Saudi Arabia and Qatar, and like that of its original parent, Al-Qaeda. Actually it combines Salafism with an apocalyptic vision previously unknown to Islam.
As it says its leader is the Caliph it claims to be the only legitimate government for Muslims.
It rules the areas it controls by violence and terror, backed by money it gets from the Gulf and from the illegal oil trade.
All this explains why following Russia's military intervention in Syria it is doomed.
The Russian military intervention means there is no danger of the Syrian government collapsing — as looked possible just a few months ago.
The Syrian army has now been able to go on the offensive, and is advancing on all fronts.
The Islamic State cannot withstand the Syrian army backed by the Russian airforce and Iran and Russia. However if it fails to hold the territory it has seized its claim to be the Islamic State collapses.
The only way the Islamic State could survive would be if the US and its allies acted to save it.
Its appalling violence and megalomaniac pretensions means that for the US it is however an embarrassment not an asset. The main thing Its grotesque antics have achieved is to unite world opinion behind the Syrian government and Russia.
Instead of willing the Islamic State's survival, the US would far rather it disappear so it can support the other jihadi terrorist groups — the so-called "moderates" — without embarrassment.
That seals the Islamic State's fate.
Source: Sputnik - Russian news agency