I've found that appeals to solidarity, by themselves, rarely move the needle for enough individuals to make a large-scale difference. Your experience may differ

I've found that appeals to solidarity, by themselves, rarely move the needle for enough individuals to make a large-scale difference. Your experience may differ. Union-to-union solidarity might perhaps be a different question - organizations reason differently than individuals. Of course, this requires that both organizations already exist. So, again, what's in it for me? The chance to "raise issues" doesn't sound like something I would want to stick my neck out for. The chance to have someone lecture me about the importance of solidarity doesn't sound appealing... for me.