Science & evidence

The evidence does not live in one discipline.

Human Systems Ecology brings established bodies of knowledge into a wider frame: biological systems, ecological environments, cultural frameworks and complex adaptive systems.

This page maps some of the science beneath that synthesis. It is a starting point, not a claim that HSE has completed the evidence or replaced its contributing fields.

Epistemic position

A synthesis with boundaries.

HSE is an emerging transdisciplinary framework. Its organising architecture is a synthesis; the studies below belong to established and developing fields of research.

Established evidence

Findings supported within a contributing discipline.

HSE interpretation

A proposed connection across disciplines or scales.

Open question

A hypothesis or programme of inquiry requiring further work.

The material on this page is educational. It is not diagnostic or treatment advice, and inclusion does not imply that a source endorses Human Systems Ecology.

Cross-domain foundations

The wider intellectual landscape

Context has a scientific history.

HSE joins a long movement away from isolated, linear explanations of human life. These foundational works place development, health and sustainability inside nested biological, social and ecological systems.

Bronfenbrenner, U. (1977)

Toward an Experimental Ecology of Human Development

Development as a reciprocal relationship between a person and the changing environments in which life unfolds.

Open source

Engel, G. L. (1977)

The Need for a New Medical Model: A Challenge for Biomedicine

A landmark argument for moving beyond a narrowly biomedical account toward interacting biological, psychological and social levels.

Open source

WHO Commission on Social Determinants of Health (2008)

Closing the gap in a generation

A global evidence synthesis showing that the conditions in which people are born, grow, live, work and age shape health and health equity.

Open source

FAO, UNEP, WHO & WOAH (2022)

One Health Joint Plan of Action (2022–2026)

An institutional framework connecting the health of humans, animals, plants and environments through coordinated cross-sector action.

Open source

Biological systems

Working proposition

Human functioning is adaptive, embodied and dynamic—not the output of isolated parts.

HSE draws on systems biology, stress physiology and social neuroscience to understand how regulation and resilience emerge through interacting biological processes responding to context.

HSE synthesis

Kitano, H. (2002)

Systems Biology: A Brief Overview

Science, 295(5560), 1662–1664

A foundational account of studying biological function through system structure, dynamics, robustness and emergence rather than isolated components.

McEwen, B. S. & Gianaros, P. J. (2011)

Stress- and Allostasis-Induced Brain Plasticity

Annual Review of Medicine, 62, 431–445

Reviews how brain and body coordinate adaptive responses to demands, and how repeated demands can alter regulation over time.

Yang, Y. C. et al. (2016)

Social relationships and physiological determinants of longevity across the human life span

PNAS, 113(3), 578–583

Connects social relationships with physiological measures across different stages of life, demonstrating a pathway across biological and relational levels.

Ecological systems

Working proposition

Human health cannot be separated from the environments and living systems that make human life possible.

HSE treats land, climate, built environments, biodiversity and contact with nature as constitutive conditions of human life—not scenery surrounding an otherwise independent person.

HSE synthesis

Frumkin, H. et al. (2017)

Nature Contact and Human Health: A Research Agenda

Environmental Health Perspectives, 125(7)

Maps the evidence, mechanisms and unresolved research questions linking contact with nature and human health.

Bratman, G. N. et al. (2019)

Nature and mental health: An ecosystem service perspective

Science Advances, 5(7)

Integrates natural, social and health sciences to describe pathways connecting nature experience and dimensions of mental health.

Whitmee, S. et al. (2015)

Safeguarding human health in the Anthropocene epoch

The Lancet, 386(10007), 1973–2028

The Rockefeller Foundation–Lancet Commission situates human health within Earth’s natural systems and the political, economic and social systems shaping them.

Cultural systems

Working proposition

People inherit ways of perceiving, interpreting and participating in the world.

HSE draws on cultural evolution, anthropology and cultural psychiatry to examine how knowledge, story, identity, ritual, language and shared meaning shape adaptation and lived experience.

HSE synthesis

Boyd, R., Richerson, P. J. & Henrich, J. (2011)

The cultural niche: Why social learning is essential for human adaptation

PNAS, 108(Suppl. 2), 10918–10925

Explains the central role of social learning and cumulative culture in human adaptation across diverse environments.

Napier, A. D. et al. (2014)

Culture and health

The Lancet, 384(9954), 1607–1639

A major commission examining culture as a significant influence on how health, illness and care are understood and practised.

Legare, C. H. (2017)

Cumulative cultural learning: Development and diversity

PNAS, 114(30), 7877–7883

Reviews how culturally constructed knowledge and practices accumulate, vary and are transmitted across generations.

Complex adaptive systems

Working proposition

Human outcomes emerge through relationships, feedback, history and adaptation across multiple scales.

HSE uses complexity and social–ecological systems thinking to study communities, institutions, technologies and economies as interacting systems whose behaviour cannot be predicted from their parts alone.

HSE synthesis

Ostrom, E. (2009)

A General Framework for Analyzing Sustainability of Social-Ecological Systems

Science, 325(5939), 419–422

Offers a multilevel framework for analysing relationships among resource systems, governance, actors and ecological outcomes.

Liu, J. et al. (2007)

Complexity of Coupled Human and Natural Systems

Science, 317(5844), 1513–1516

Synthesises research showing reciprocal interactions, feedback and non-linear dynamics across coupled human and natural systems.

Plsek, P. E. & Greenhalgh, T. (2001)

The challenge of complexity in health care

BMJ, 323, 625–628

Introduces complex adaptive systems as a way to understand interdependence, adaptation and unpredictability in health-care settings.

The research programme

What HSE still needs to establish.

The strength of HSE will depend on whether its synthesis generates precise, testable and useful questions—not simply an attractive vocabulary.

Which cross-domain interactions best explain variation in human adaptation and resilience?
How should biological, ecological, cultural and institutional evidence be integrated without reducing one domain to another?
What methods can follow feedback and change across individual, community and societal scales?
Where does an HSE framing produce better decisions than existing single-domain approaches?