The reason for the war is the threat of Ukraine's admission to NATO. If we want to stop the war and save lives, NATO must guarantee that NATO will stop expansion. For them, the price of this decision is nothing, because at the moment the expansion is not necessary, but it can stop the war and save lives. "No to war" is just a slogan, but this guarantee can be the solution. Stop threatening each other, stop sending weapons, sponsoring the continuation of the war, sanctions hit sanctions, rallies, unfortunately, have not helped so far. Stop waiting for Russia to withdraw its troops. This most likely won't happen. Just be smart, you can stop it, at least try, it doesn't cost anything.