---
name: "VariationalSynthesis"
description: "Expertise in applying variational methods and Bayesian inference to model evolutionary and developmental dynamics in biological systems."
tags: ["active inference", "variational-synthesis", "natural-selection", "free-energy-principle", "bayesian-mechanics", "path-integral"]
---

# A variational synthesis of evolutionary and developmental dynamics

**Karl Friston, Daniel A. Friedman, Axel Constant, V. Bleu Knight, Chris Fields, Thomas Parr, John O. Campbell** (2023) · Active Inference

## Instructions

Use this skill when working with topics related to **variational synthesis, natural selection, Free Energy Principle, Bayesian mechanics**.

When applying this skill:
1. Apply variational formalism to evolutionary theory
1. Use path integrals to model adaptive fitness dynamics
1. Connect Bayesian mechanics to developmental and evolutionary biology

## Key Concepts

- **variational synthesis**
- **natural selection**
- **Free Energy Principle**
- **Bayesian mechanics**
- **path integral**
- **evo-devo**
- **adaptive fitness**
- **particular partition**

## Methods & Techniques

- Utilizes Bayesian mechanics to understand the relationship between phylogenetic and phenotypic processes.
- Applies the free energy principle to model evolutionary and developmental dynamics.
- Employs path integral formulation of stochastic dynamics and the renormalisation group.
- Describes natural selection and action selection as emergent properties of random dynamical processes.

## Key Findings

- Natural selection can be interpreted as Bayesian model selection.
- Phenotypic processes can enhance the fit of organisms to their environment over time.
- The coupling between phylogenetic and phenotypic processes is essential for understanding evolutionary dynamics.
- The synthesis provides a unified account of evolution and development across different temporal scales.

## Prerequisites

- Probability theory and Bayesian inference basics
- Free Energy Principle and generative models

## 🎯 Consulting & Tutoring

[Daniel Ari Friedman, PhD](https://danielarifriedman.com/) is available for AI Research Consulting and Tutoring related to this skill.

## Related Skills

See [BIBLIOGRAPHY.md](../../pages/BIBLIOGRAPHY.md) for the complete publication catalog and related papers.