The Economists for Ukraine has published a 28-point peace plan, which emphasises that ending the war is only possible if the aggressor is effectively deterred.
The document is available here
A separate policy document has also been prepared for Ukrainian and European government officials, outlining proposals for a peace plan that is safe for Ukraine:
You can add your signature here.
Tetyana Deryugina has also prepared a post in support of this policy document — please share this post as well.