In my opinion, there is no way that early Facebook was reducing happiness and life satisfaction in aggregate. I doubt you were a Facebook user in that period if that’s your perception. It was so benign in the early days.

If I wasn't on Facebook then I wouldn't have been able to join my local running group. That is one demonstration of how it has increased my happiness by me being on it. However, if Facebook didn't exist then the running group would probably use some other platform so in aggregate Facebook hasn't improved things; just made it easier for groups to organise.

Nah, it was good in ‘04 ‘05. Being able to see photos other people took of you at parties was a novelty and was welcome. It was like a phone book with photos.

Even later the groups function was great for many.

On balance it’s been bad, but it has its moments in the sun.

It was also a desktop experience so it wasn’t nearly as potent as it was when the smartphone showed up