you do not need event sourcing to do Domain Driven Design

Event sourcing can be one or both of

• a way to store state changes in your entities
• a way to build data projections from other domains

ACV only uses the latter, but in any case persistence is not a concern of the domain: while you do need persistence, it's one of the satellite concerns and not at the core of Domain Driven Design (start with your entities and work out from there). Having a data projection of e.g. organizations is helpful, but it is not necessary.