diff --git a/README.md b/README.md
index b86d893..ef400c8 100644
--- a/README.md
+++ b/README.md
@@ -6,3 +6,6 @@ Let's make a game, and start small.
 1. idk, C libraries, probably.
 1. Multiplayer map, distributed with consensus algorithm.
 1. Worldwide, serverless, MMORPG.
+
+Read the overview.
+
diff --git a/World/Players_are_Entropy.md b/World/Players_are_Entropy.md
new file mode 100644
index 0000000..3b57629
--- /dev/null
+++ b/World/Players_are_Entropy.md
@@ -0,0 +1,22 @@
+This is the opposite of a building game.
+
+Dwarf Fortress presents a world which decays over time.
+The player must build, despite the decay.
+
+Every Sims game invites a player to build with limited resources, then feeds entropy into the system.
+The player enforces order.
+
+But the fishtank is order.
+
+The fishtank will right itself.
+Every death creates an environment for flourishing later.
+The ecosystem will always pull itself back to the same old patterns, held up by a solid inter-linked food-chain.
+The fishtank appears chaotic, but it has rules.
+
+The player must break the rules to be free.
+
+The player's job is to get out of the goblin-filled caverns, and their only path ahead will be upsetting the natural balances within the cave.
+They must understand the system, then destroy it.
+
+This should feel like the opposite of a building game.
+They must play on the system until it collapses in on itself.
diff --git a/overview.md b/overview.md
index c35f3d6..8bd433f 100644
--- a/overview.md
+++ b/overview.md
@@ -3,6 +3,8 @@ The Fish-Tank Game
 
 This was made to be read slowly, like a security-focussed man page with all the POSIX-compatibility flags removed.
 
+The scattered notes just add detail, so you can scan or ignore them.
+
 Stage 1: Popular Populations
 ----------------------------
 
@@ -54,6 +56,8 @@ That's the core-concept; you watch an ecosystem fight, and plan how to mess with
 Sometimes the player must run back and find a new route.
 A lot of the time, the player can guess what's up a tunnel, just by what goes in and out.
 
+The world is order, [the player is chaos](World/Players_are_Entropy.md).
+
 Layers
 ------