Using the metaphorical (or maybe literal) model of ideas as living things - there should be conditions we can create to nurture an ecosystem of beneficial ideas. Like making a garden or farm.
Not just thinking about transmission method (memes, books, songs, art, gatherings) but also having a defined, intentional and continued program of evaluating ideas and spreading ideas.
https://www.solutionsjournalism.org/journalists/connect#:~:text=Constructive Network is based in,to journalism%2C including solutions journalism.