A new war in Ukraine would be bad for the entire globe, but we might just get one anyway. Once the Biden administration took control of the White House, they decided to wage a campaign of maximum pressure against Russia, and Ukraine is one of the key tools that they are using. Ukrainian President Volodymyr Zelensky never would have signed Decree No. 117/2021 on March 24th without the encouragement of the Biden administration, and the extremely aggressive statements about Crimea in that document deeply alarmed the Russians. Even more importantly, it appears that the Ukrainians were secretly preparing a massive offensive against areas of eastern Ukraine that are held by the separatists. If those areas could have been captured before Russia could react, that would have been a massive victory for Ukrainian President Volodymyr Zelensky and the Biden administration. But the Russians caught wind of what was going on, and that is why they have been sending forces into Crimea and into separatist-held areas of eastern Ukraine in numbers that we have never seen before.
A hothead is in charge of our foreign policy, he is surrounded by a team of all-star warmongers, and we are now closer to war with Russia than we have been in decades.