Why do Nordic countries always score so high on happiness indexes? And what’s social freedom like up there?

Hi! I keep seeing Nordic countries like Finland, Denmark, and Norway at the top of every happiness ranking.

So Im curious:

1. Why do the Nordics always get such high happiness scores?
2. And whats social freedom like there in real life?

(By “social freedom,” I mean the extent to which people can express their opinions, choose their own lifestyle, openly show their identity, and live their daily lives without feeling pressured.)

Im collecting perspectives for a school report. If you live there or know the region well, Id love to hear your thoughts!