Other people's pleasure is not inherently valuable to me, just neutral. However, I do value other people's pleasure when it increases my pleasure.
It is pretty obvious why this applies to loved ones and friends, but it actually extends to all of society. A happier society is a better place to live, with more productivity, more to be inspired by (and not discouraged by), etc.
It is pretty obvious why this applies to loved ones and friends, but it actually extends to all of society. A happier society is a better place to live, with more productivity, more to be inspired by (and not discouraged by), etc.