Where do new ideas come from?

I think that new ideas can mostly come from group discussions. I think so because many ideas are thought up of in class discussions. Also in group disscussions people can share their individual ideas and maybe imrpove their original idea. Also, If say a person wanted to think of ideas for a piece of writing they could brainstorm on a sheet of paper and just jot down any ideas that come to mind and then one would critique it later. As for ideas in our world, most of the world ideas our in meetings with world leaders and they discuss many problems and brainstorm how to solve them.