I feel like I am at the stage of creating an "MVP for a social movement". i.e. trying to work out if this is something that people want, if this is a topic people care about.

Presumably if I am alone in my passion for the subject then no-one will ever comment/reply/email/express their agreement.

If however lots of people start to agree, to put their hands up and say they feel the same, then I can take a next step which is I'm guessing to do what you say which is to define a call to action - but what would that be, can you suggest?

> Presumably if I am alone in my passion for the subject then no-one will ever comment/reply/email/express their agreement.

You don't have to wait for others to agree with you. Part of activism is making other people aware of an issue and inspiring passion about it.

> If however lots of people start to agree, to put their hands up and say they feel the same, then I can take a next step which is I'm guessing to do what you say which is to define a call to action - but what would that be, can you suggest?

The book Playbook For Progress: 16 Qualities of the Successful Organizer has a detailed description of how activism works. It isn't theoretical - the author founded the Bus Rider's Union (https://en.wikipedia.org/wiki/Bus_Riders_Union_(Los_Angeles)).

One problem we can all suffer from is the “not invented here” problem. You may want to create a social movement but perhaps the movement you want already exists? These things often lack the publicity they need so you may not have seen it. Your efforts will likely be much more valuable if they are connected to an existing movement with active members and momentum rather than starting anew.