Another way to get involved might be to join OSINT (Open Source Intelligence) community and help vet information from disinformation etc. There is a nice introductory article to be found here: https://www.freethink.com/technology/osint-ukraine
Michael
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Rough attempt to profile charities which support Ukrainian war relief in terms of their cost-effectiveness.
There is an initiative called Tech for Ukraine, aimed at pairing NGOs with tech companies in order to help the former develop IT capabilities eg. related to cybersecurity, embedded payments, gathering donations etc. - all this to amplify the humanitarian and civil society response in Ukraine.
Main page:
https://techtotherescue.org/tech/tech-for-ukraine
Case studies about projects so far (done for non-Ukraine related NGOs):
https://www.techtotherescue.org/case-studies
This could be an effective way to get involved, provided you have the skillset or you work in a company that can provide one.
I wonder about the issue of how cost-(in)effective current interventions really are—it’s true, that current interventions in the war zone can seem cost-ineffective in terms of immediate help to affected populations, however there is one larger game at play—Russian Federation’s (and Belarussian) aggression against Ukraine effectively demolished the current peacekeeping balance in Europe and across the world, and it seems that responding to worldwide defence challenges in case of Russian victory can be much more costly and time/attention consuming, than in case of Ukrainian victory, see a possible analysis here:
https://www.foreignaffairs.com/articles/ukraine/2022-02-18/what-if-russia-wins
Therefore, it seems to me (curious to hear your thoughts), that supporting Ukraine’s defence/humanitarian response, even if seems less cost effective at the face value than other possible EA actions, can actually save a lot of money/time/attention in the long-term perspective (not sure how to quantify how it exactly measures up to other existential risks etc., but my first reaction is that with new Cold War going on in case of Russian victory, responding globally to any other existential risks will be much more complex and difficult—however, how one’s indivitual contribution/donation plays into all of this is one tricky question).