diff --git a/src/EcsWorld.static.cs b/src/EcsWorld.static.cs
index d364a2f..2798fd8 100644
--- a/src/EcsWorld.static.cs
+++ b/src/EcsWorld.static.cs
@@ -21,7 +21,7 @@ namespace DCFApixels.DragonECS
         #endregion
 
         private static EcsWorld[] _worlds = Array.Empty<EcsWorld>();
-        private static IdDispenser _worldIdDispenser = new IdDispenser(4, 0, n => Array.Resize(ref _worlds, n));
+        private static readonly IdDispenser _worldIdDispenser = new IdDispenser(4, 0, n => Array.Resize(ref _worlds, n));
 
         private static StructList<WorldComponentPoolAbstract> _allWorldComponentPools = new StructList<WorldComponentPoolAbstract>(64);
         private StructList<WorldComponentPoolAbstract> _worldComponentPools;
@@ -66,6 +66,22 @@ namespace DCFApixels.DragonECS
             return ref WorldComponentPool<T>.GetForWorldUnchecked(worldID);
         }
 
+        public static void ResetStaticState()
+        {
+            for (int i = 1; i < _worlds.Length; i++)
+            {
+                var world = _worlds[i];
+                if (world == null) { continue; }
+
+                if(world.IsDestroyed == false)
+                {
+                    world.Destroy();
+                }
+                world = null;
+            }
+            _worldIdDispenser.ReleaseAll();
+        }
+
         #region WorldComponentPool
         public ReadOnlySpan<WorldComponentPoolAbstract> GetWorldComponents()
         {
@@ -251,11 +267,14 @@ namespace DCFApixels.DragonECS
         }
         #endregion
 
+        #region NullWorld
         private sealed class NullWorld : EcsWorld
         {
             internal NullWorld() : base(new EcsWorldConfig(4, 4, 4, 4, 4), null, 0) { }
         }
 
+        #endregion
+
         #region DebuggerProxy
         protected partial class DebuggerProxy
         {