In a wish to show I am capable of building up dramatic tension, here is one slide from a talk by Prof Heiner Rindermann which shows the correlations between cognitive ability, institutions and the wealth of nations, arranged in a Structural Equation Model. The loadings have been removed just to make the picture clearer, but the fuller version can be found in the conference slides. This is the trailer, to be gazed at while eating popcorn and waiting for the main feature.
The main feature is in two formats, so split screen would probably be the best way to see things.
First, here is the link to the whole conference slide show “Has Europe been enriched by contemporary immigration?”
(Check out the SEM on page 12, to see whether you prefer the simplified version or the original)
Here is the link to the talk itself: