even if you don’t plan on joining any organisations you do move the needle forward - if you bring up the topic of said organisation existing and speak of it in a good light others will look it up, and maybe join, maybe not - but the positive word will spread. and if many people see an organisation in a positive light, then it’s more likely they’ll join

nobody is useless, every kind person moves things forward, even if just a little, it’ll all add up to a lot