diff --git a/evil-collection.el b/evil-collection.el
index bfa8523..bd58693 100644
--- a/evil-collection.el
+++ b/evil-collection.el
@@ -183,5 +183,34 @@ instance:
                                            lispyville-delete)
   "List of delete operators.")
 
+(defun evil-collection-inhibit-insert-state (map)
+  "Unmap insertion keys from normal state.
+This is particularly useful for read-only modes."
+  (evil-define-key*
+   'normal map
+   [remap evil-append] #'ignore
+   [remap evil-append-line] #'ignore
+   [remap evil-insert] #'ignore
+   [remap evil-insert-line] #'ignore
+   [remap evil-change] #'ignore
+   [remap evil-change-line] #'ignore
+   [remap evil-substitute] #'ignore
+   [remap evil-change-whole-line] #'ignore
+   [remap evil-delete] #'ignore
+   [remap evil-delete-line] #'ignore
+   [remap evil-delete-char] #'ignore
+   [remap evil-delete-backward-char] #'ignore
+   [remap evil-replace] #'ignore
+   [remap evil-replace-state] #'ignore
+   [remap evil-open-below] #'ignore
+   [remap evil-open-above] #'ignore
+   [remap evil-paste-after] #'ignore
+   [remap evil-paste-before] #'ignore
+   [remap evil-join] #'ignore
+   [remap evil-indent] #'ignore
+   [remap evil-shift-left] #'ignore
+   [remap evil-shift-right] #'ignore
+   [remap evil-invert-char] #'ignore))
+
 (provide 'evil-collection)
 ;;; evil-collection.el ends here