Can you build ethics without God?

Atheists have been trying for awhile to come up with a coherent theory of ethics and morality without God, and Stefan Molyneux's attempt is more formidable than most.

But it still comes up short.

And I explain exactly why, after first steelmanning his Universally Preferable Behavior (UPB) theory in a way that presents it, perhaps, more clearly than it's ever been presented before.

(00:00) Stefan’s Huge Claim: “Biggest Achievement in Philosophy”
(01:00) What Does “Should” Really Mean?
(01:50) “Because God Says So” Morality
(02:10) Classical View: Good Knife, Good Human
(03:40) Introducing UPB: Universally Preferable Behavior
(04:25) Claim 1: Self-Ownership
(04:45) Claim 2: Moral Equality
(05:10) Claim 3: Justified vs Unjustified Force
(05:35) Claim 4: Reason as Binding
(06:35) The UPB Algorithm: 5 Rule Tests
(06:45) Step 1: Universalize the Rule
(07:05) Step 2: Can the Rule Be Followed?
(07:20) Step 3: Does It Treat Equals Equally?
(07:45) Step 4: Does It Self-Destruct?
(08:15) Step 5: Does It Involve Force?
(09:07) Problem 1: Hidden Axioms
(11:27) Problem 2: Logic = Moral Guilt?
(11:56) Problem 3: UPB is Just a Filter, Not a Builder
(13:22) Problem 4: UPB Makes Morality Tiny
(14:45) Role-Based Asymmetry: Why UPB Struggles
(15:00) Classical Theism Explains What UPB Assumes