I wouldn't say "strife" but perhaps "challenges". I think things like a wander-year, self-initiated long-term projects, like starting a business, writing a program, building something architecturally, making a short film, etc.
There's plenty of "strife" in day to day life, some other jerks on the road, to your co-workers, to your friends and family. Or just working on your long term goals and dreams in the face of the demands of every day life.
I don't think human conflict or violence is necessary for flourishing.
There are examples of great creative people who had come from backgrounds of violence or abuse, but I don't think that means much. If they were exposed to more violence, would they have been even more genius? What is the right amount of violence to expose people to to have genius blossom?