Everett's many-worlds interpretation is nothing to do with fine-tuning, but as you point out, eternal inflation might be worth looking at. I found this paper,

Everett's many-worlds interpretation is nothing to do with fine-tuning, but as you point out, eternal inflation might be worth looking at. I found this paper, which looks interesting: https://arxiv.org/pdf/hep-th/0407213v3.pdf https://arxiv.org/pdf/hep-th/0407213v3.pdf My interest in the subject predates this - when actively researching the subject I developed a scalar-tensor theory consistent with Dirac's Large Number Hypothesis, and preferred the idea that there's only one possible set of physical laws. I was never happy with the Anthropic Principle.