A lot has already been written and said about the causes behind the invasion of Ukraine by Russia. I am putting this down mostly to organize my own thoughts, and to warn about trying to find and focus on a single cause for the war. Usually when someone wants to boil it down to a single cause, they do it to promote something else, such as a theory or a Youtube video. Reality rarely is this simple, and often I find that the causes behind something are arranged as a self-reinforcing network of causes that point in the same direction, rather than a single all-important cause. I think this is also the case for this war. Lets go through the causes that I see lying behind it.
Russian nationalism
"Mikhail Zygar (2016) reveals that Putin has always been obsessed and frustrated with Ukraine. Zygar (2016, 85) writes that Putin was obsessed with Ukraine from the first day of his presidency saying, ‘We must do something, or we’ll lose it’ (Zygar (2016, 258). When somebody mentions Ukraine in front of Putin, ‘he flies into a fury; the words at the end of his sentences are replaced by Russian expletives. For him, everything the Ukrainian government does is a crime’ (Zygar 2016, 4)." (source)
"There are several important things happening to Russia that need to be understood: First, jealousy of Ukraine and its possible successes is an innate feature of post-Soviet power in Russia; it was also characteristic of the first Russian president, Boris Yeltsin. But since the beginning of Putin’s rule, and especially after the Orange Revolution that began in 2004, hatred of Ukraine’s European choice, and the desire to turn it into a failed state, have become a lasting obsession not only for Putin but also for all politicians of his generation.
Control over Ukraine is the most important article of faith for all Russians with imperial views, from officials to ordinary people. In their opinion, Russia combined with a subordinate Ukraine amounts to a “reborn U.S.S.R. and empire.” Without Ukraine, in this view, Russia is just a country with no chance of world domination. Everything that Ukraine acquires is something taken away from Russia." (source)
Oil and gas
"By 2020, overseas trade made up 46% of Russia’s GDP, World Bank figures show. Oil and gas still provided more than half its exports, with metals accounting for 11%, chemicals about 8% and food products 7%." (source)
“Trade accounts for 29 percent of Russian GDP, but Russia imports about 60 percent of its total consumption and pays for imports with earnings from exports, which are overwhelmingly dominated by oil and gas.”
“As of late 2019, known Ukrainian reserves amounted to 1.09 trillion cubic meters of natural gas, second only to Norway’s known resources of 1.53 trillion cubic meters.” (source)
Food
Ukraine produces 18% of the world’s sunflower seed, safflower or cottonseed oil exports; 13% of corn production; 12% of global barley exports; and 8% of wheat and meslin. (source)
Between them, Ukraine and Russia account for 70% of Egypt and Turkey’s wheat supply. While Ukraine is a major exporter to Asia, Russia provide a large percentage of the wheat demands for sub-Saharan Africa. (source)
Political competition
"This precedes Trump, but he's made it worse: The GOP tactic is not to claim to be good guys, but to claim everyone is equally bad, and to breed cynicism and paranoia. Notably, this is also how Putin controls the Russian public." (source)
“Putin’s attack on Ukraine is driven by the need to delegitimise any form of democracy in a country whose language, religion and culture is adjacent to that of Russia” (source)
Moreover, Russia is a economically a kleptocracy, where a class of extremely wealthy political rentiers extract value from low-complexity industry such as raw materials and metallurgy. The Ukrainian sociologst Volodymyr Ishchenko, calling these rentiers "political capitalists", wrote:
The discussion of the role of the West in paving the way for the Russian invasion is typically focused on NATO’s threatening stance toward Russia. But taking the phenomenon of political capitalism into account, we can see the class conflict behind Western expansion, and why Western integration of Russia without the latter’s fundamental transformation could never have worked. There was no way to integrate post-Soviet political capitalists into Western-led institutions that explicitly sought to eliminate them as a class by depriving them of their main competitive advantage: selective benefits bestowed by the post-Soviet states. The so-called “anti-corruption” agenda has been a vital, if not the most important, part of Western institutions’ vision for the post-Soviet space, widely shared by the pro-Western middle class in the region. For political capitalists, the success of that agenda would mean their political and economic end. (source)
The political trajectory started by the Maidan revolution set Ukraine on a collision course with the rentier class, many of whom had economic interests in Ukraine, or feared direct competition from it.
Redirecting internal dissent
“to the extent you can capture the threat of mass rebellion with opinion and protest trends, late 2021 looked the worst in Putin’s entire tenure. In 2021, ~20% of Russians openly declared they would join protests with political or economic demands, per Levada data. The rate of labor protest was the highest recorded during Putin’s tenure - despite the pandemic and the much greater repression. At the same time, popular revolts have pushed neighboring dictatorships in Belarus and Kazakhstan to the brink of collapse – and Russian pollsters detected signs that these events might motivate Russians to rise up in protest too. Trust in Putin dipped below 30% for the first time, suggesting that his approval (which remained high) was “hollowing out” and that he was starting to lose the confidence even of core supporters. Also, the share of Russians who declared they wanted to retire after the end of his term in 2024 was about to surpass those wanting him to stay. Last time that happened was in 2013– and it was reversed by the Crimea annexation. The invasion of Ukraine is achieving the same now.” (source)
“It does not matter where NATO’s border is; the Putin regime will still have an incentive to stage conflicts to demobilize opposition in Russia” (source)
“That the benefits in Russia’s cost-benefit calculations are evident only to its president presents a problem both for understanding the current situation and predicting Putin’s next move. To solve this puzzle, it’s helpful to take the Ukraine crisis out of the realm of foreign policy and put it into the world in which Putin spends most of his time: that of Russian domestic politics. Viewed in that light, the war represents a continuation of Putin’s efforts to govern by presenting Russia as threatened by external forces bent on its destruction, and himself as the only leader who can successfully oppose them.” (source)
" the Russian elite over the past 23 years has learned rules that have never failed: War is not that expensive, it solves all domestic political problems, it raises public approval sky-high, it does not particularly harm the economy, and — most importantly — winners face no accountability. Sooner or later, one of the constantly changing Western leaders will come to us to negotiate." (source)
The Russian military industry
Russia’s arms export revenues of 15 billion U.S. dollars are dwarfed by its export of fuel and energy products that amounted to 134.7 billion U.S. dollars in 2016, according to the UN Comtrade database. Since 2014, export of agricultural products and foodstuffs have surpassed Russia’s arms export; for 2016 this line amounted to 17 billion U.S. dollars. Still, arms account for approximately 70% of Russia’s export of machinery and equipment. It is also an important source for complementary revenues without which defence industrial marginal costs would be higher. (source)
“There are, however, parts and services that Russia currently imports only from Ukraine. Russia’s military depends on Motor Sich in the southeastern Ukrainian city of Zaporizhia for helicopter engines and on the Russian company Antonov’s plant in Kyiv for transport planes. Most importantly, the Russian army relies on the Southern Machine Building Plant Association, known as Yuzhmash, in the southeastern Ukrainian city of Dnipropetrovsk, which designs, manufactures, and services rockets and missiles.Some of the most important ties between the two countries’ military industries relate to Russia’s strategic nuclear forces. More than half of the components of Russia’s ground-based intercontinental ballistic missiles come from Ukraine. Ukrainian specialists carry out regular inspections of Russia’s strategic missiles to certify them for service as well as supplying essential missile components including targeting and control systems for the RS-20 Voyevoda missile (known by NATO as the SS-18 Satan).” (source)
“The technologies of Ukrainian companies made it possible to produce 12 of the 20 most powerful missile technologies of the Cold War, including the unparalleled “Satan” (developed by the design bureau “Southern” Dnipro)" (source)
"Allegedly, 400 Russian defence companies were dependent on supplies from Ukraine for more than 3,000 parts, components and final products for more than 200 different arms systems, including engines for helicopters, aircraft and surface ships." (source)
“Prior to the current tensions, Ukraine was Russia’s primary producer of marine gas turbines … Reportedly, two Project 22350 frigates, the Admiral Golovko and Admiral Isakov, are sitting with no propulsion plants. ... New ships lying idle are a strategic hindrance to the Russian Navy” (source)
"However, a shared weak point in many of these export products is that they are in fact modernised versions of Soviet systems and equipment, and the need to replace them with new generation systems is rapidly getting more pressing." (source)
The NATO bogeyman
If Ukraine wants to join NATO, "it will probably lead to a massive military operation by Russia against Ukraine. Because they're going to have to destroy us in terms of infrastructure and turn everything into devastation territory so that they [NATO] don't want us... They have to do it before we join NATO, so NATO won't be interested in us. They wouldn't be interested because of the devastation. With a 99.9% probability, the price for our entry into NATO is a major war with Russia. And if we don't join NATO, it's gonna be a Russian takeover in 10 to 12 years. And that's our current crossroads." (source)
Then he was asked: which course would then be better? He responded, "Of course, a big war with Russia, and joining NATO on the basis of victory over Russia." He then outlined the strategy that Russia would follow, and it matched almost perfectly with what happened.
“It's worth remembering that Russia's 2014 invasion of Ukraine was sparked by a trade treaty, not by a near- or even mid-term threat of NATO expansion. And no, the EU is not a back door to NATO. If anything, the NATO is a back door to the EU, which is much, much harder to join. …The expansion of EU influence puts insurmountable pressure on the Russian political economy to move from a rent-based, patronal model of wealth creation and power relations, to a system of institutionalized competition. Having satellite states that are governed in the same patronalist mode as Russia gives Moscow geo-economic breathing space, adding years or decades to the system's viability.” (source)