A combination of factors, probably too many to go into with any depth but - Brilliant youth scouting network, great coaches, club-wide philosophy instilled at a young age, massive catchment area for youth players, several brilliant players came out of La Masia within the same time period, have bought reasonably well when bringing in outside talent. There's so much more, but there's a gleaning for you.
Do you think any of the cardinals will be using bribes, future favours/ promises to secure the papacy, or will everything be above board?