Ukraine's President Volodymyr Zelenskiy holds a conversation with European Commission President Ursula von der Leyen via videolink, as Russia's attack on Ukraine continues, in Kyiv, Ukraine May 9, 2022. 

Here are the five crucial tests Ukraine and its global partners and allies must tackle as Russian President Vladimir Putin's criminal war approaches its most decisive phase.

Some are short-term, and others have generational consequences. What unites them is that all five are necessary to transform Putin's murderous authoritarian threat into a historic opportunity for the civilized world to shape a better future.