[red-iron-pine]

On Killing also has serious issues with credibility

it relies on SLA Marshall's dubious work, and several other examples it uses are difficult to take seriously.

it's similar to Freud, where there are shreds of truth but not really universally true or applicable.

[gherkinnn]

Unlike Freud, the claims in the book are falsifiable.

The psychological model it presents is concrete enough for anyone to present evidence against it. You can use the model to make predictions about human behaviour. The same cannot be said a out Freud.

Now, that doesn't mean its true. It merely means it's not complete rubbish.