diff --git a/agora pkg chapter.md b/agora pkg chapter.md
index c9ad6f10d..ff4b75be6 100644
--- a/agora pkg chapter.md	
+++ b/agora pkg chapter.md	
@@ -13,7 +13,7 @@
   - #meta the containing block and these children exemplify text based [[agora protocol]] (whose concise description is in scope for this chapter)
     - #pull [[commons]] [[knowledge commons]] [[elinor ostrom]]
     - #pull [[altruism]] [[effective altruism]] [[peter singer]]
-    - #pull [[revolution in the 21st century]] [[murray bookchin]]
+    - #pull [[free software]] [[confederation]] [[adversarial interoperability]] [[revolution in the 21st century]] [[murray bookchin]]
 
 # Preamble