Mechanisms and Likelihood of Life’s Emergence from Chemistry

Ascertain the mechanisms and conditions under which life emerges from nonliving chemistry on young planets, and determine whether abiogenesis is inevitable, extremely unlikely, or contingent on additional, presently unknown factors.

Background

Discussing emergent probability, the paper uses the transition from chemistry to biology to illustrate higher‑level intelligibility arising from lower‑level processes. Despite advances, the concrete pathway by which life first emerged remains unresolved.

This uncertainty affects assessments of fine‑tuning, since the ease or difficulty of abiogenesis influences how stringent life‑permitting conditions must be.

References

To return to the example of biology emerging from chemistry, as far as I am aware, we are still ignorant about how that emergence happened. If there is a young planet with a chemical soup floating around, we are not sure whether life will inevitably form, or whether it is extremely unlikely, or whether it requires additional scientific ingredients about which we are currently unaware.

— Does a Fine-Tuned Universe Tell Us Anything About God?  (2502.12083 - Hincks, 12 Feb 2025) in Section: Fine-Tuning and Emergent Probability

The unknown here is the likelihood that planets rapidly progress from so-called “prebiotic chemistry” to stable biospheres. First, it is not clear that there is any real distinction between an abiotic world and a “prebiotic” world, because we do not know if it can be knowable that a planet is on the way from non-life to life prior to that life emerging.

— The Epistemic Risk of the 31st Spore: If Planets Aren't Fine Tuned, We're Doing Life Detection Wrong  (2609.10604 - Smith et al., 8 Sep 2026) in Section “Our near-complete ignorance on the fragility of nascent biospheres”

However, there is a question that remains about the distribution of life. Is it isotropic and prevalent, or is it a rare instance of a certain set of conditions?

— The VLA and High-Frequency SETI: Expanding the Search for Life  (2608.18275 - Myburgh et al., 18 Aug 2026) in Section 1, Introduction