---
id: people/robert-rosen
about:
  label: Robert Rosen
  description: >-
    Theoretical biologist (1934 to 1998) whose book Anticipatory Systems defined
    a system that carries a predictive model of itself and acts on what the
    model says.
  tags:
    - anticipation
    - relational biology
    - modelling relation
    - theoretical biology
person:
  affiliation: Dalhousie University
  role: theoretical biologist
provenance:
  origin: agent
  sources:
    - title: Robert Rosen (biologist) - Wikipedia
      url: 'https://en.wikipedia.org/wiki/Robert_Rosen_(biologist)'
    - title: >-
        Anticipatory Systems: Philosophical, Mathematical, and Methodological
        Foundations, second edition | Springer
      url: 'https://link.springer.com/book/10.1007/978-1-4614-1269-4'
    - title: >-
        Robert Rosen's Anticipatory Systems Theory: The Science of Life and Mind
        (Judith Rosen, Mathematics 10(22), 2022)
      url: 'https://www.mdpi.com/2227-7390/10/22/4172'
    - title: Handbook of Anticipation | Springer
      url: 'https://link.springer.com/referencework/10.1007/978-3-319-91554-8'
  created: '2026-11-02'
  reviewed: '2026-11-02'
  reviewed_by: 'Claude, from the sources listed'
  status: draft
---
Robert Rosen was an American theoretical biologist, born in Brooklyn on 27 June 1934 and died on 28 December 1998.[^1] He took a PhD in relational biology under Nicolas Rashevsky at the University of Chicago in 1959, stayed there until 1964, and then moved to the University at Buffalo with a joint appointment at its Center for Theoretical Biology.[^1] In 1975 he went to Dalhousie University in Halifax, Nova Scotia, as a Killam Research Professor in physiology and biophysics, and stayed until he took early retirement in 1994.[^1] He was president of the Society for General Systems Research, now the International Society for the Systems Sciences, in 1980 and 1981.[^1]

His work asked what life is, and held that a reductionist physics of mechanisms could not answer the question.[^1] He proposed relational biology, which treats an organism by its organisation, the relations among its parts and with time and environment, and devised the (M,R) systems as minimal relational models of a living thing.[^1] A year-long sabbatical at the Center for the Study of Democratic Institutions in Santa Barbara led him to what he called anticipatory systems theory.[^1] His book Anticipatory Systems sets out what he called the modelling relation between a natural system and a formal one, and separates a true modelling relation from a simulation not based on such a relation.[^1] Its publisher credits the book with founding the area of anticipatory systems theory.[^2] His daughter, Judith Rosen, writes that she spends much of her time making his work accessible, and that she counts anticipatory systems theory as its most important part.[^3]

He is the author of [Anticipatory Systems](/media/anticipatory-systems/), and his definition of an anticipatory system appears in the entry on [foresight and anticipation](/terms/foresight-and-anticipation/). The [Handbook of Anticipation](/media/handbook-of-anticipation/) includes him in its historical overview of earlier thinkers.[^4]