The phrase "indifferent world" means that the world does not care or show any concern or interest towards someone or something. It suggests that the world is neutral and unaffected by what happens to them or their situation. Full definition
Without a badge to open doors and strike fear in the guilty, Bosch learns afresh how brutally indifferent the world can be, but with every conversation and every thread of evidence he senses a larger more ruthless presence than he has ever known before. (bookbrowse.com)
Explore a massive, morally indifferent world as Geralt of Rivia, a charming and equally dangerous warrior. (blog.us.playstation.com)
Here's how it describes itself on its «Who we are,» aka About Us page (a great place to define your tone of voice): «We're an odd bunch of international misfits, huddling together for warmth in a cold, indifferent world that thinks it's weird to actually love things like content marketing and technology markets and B2B companies and storytelling and stuff like that. (entrepreneur.com)