I know that I am behind on reading the posts, but I believe that some was asking about artists that did work about peace besides Picasso. I didn't catch if anyone mentioned Horace Pippin.
There is a video available:
Horace Pippin: There Will Be Peace
Sorry if this is a duplication.
~^~
Vivian
Increase the Peace ~^~
{^}Each time a man stands up for an ideal, or acts to improve the lot of others, or strikes out against injustice, he sends forth a tiny ripple of hope. Robert F. Kennedy