A global community connected through systems theory, science, and practice 

"To gain knowledge, we must learn to ask the right questions; and to get answers, we must act, not wait for answers to occur to us."
ISSS Past President Anatol Rapoport
The ISSS is a community of researchers, learners, and practitioners who are devoted to transdisciplinary inquiry into the nature of complex systems and the application of systems approaches for transformative change.
Conceived in 1954, the ISSS advances systems science theory and application by connecting and enabling researchers and practitioners, and disseminates the knowledge of systems to a global audience. 
As an international society we are exploring ways to translate this website into other languages. You can enter the website address here https://translate.google.com/?sl=en&tl=es&op=websites to start a machine translation process.

Conference 2023

Registration is Closed!
 We have a few spaces left. Contact conference@isss.org  and cc roelien.goede@gmail.com urgently if you are interested.
Take note of the detail of a Travel Agent on Conference Web Page.
JOIN US ON 25 MARCH for a question and answer session during our mini-symposia slot. 
Visit the Conference Webpage for all information :
Venue Detail
Call for paper
Keynote Speakers
Details and link to registration. 
The 2023 Conference will be at the Skukuza Lodge in Kruger National Park in South Africa in June 19-23 June 2023. There will be a Systems Practice Workshop from 17-23 June.
Registration Guide (link to registration on the conference page)


Short video introducing the ISSS and this website. Click bottom right of player to go full screen.


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ISSS President

The ISSS President for 2022-2023 is Roelien Goede PhD. 
Incoming Address given at ISSS 2022 Conference, Monday 11 July 2022.


Speaker: Örsan Şenalp on Unity of Science: Contributions from Bogdanov
Saturday, April 1, 2023
Speaker: Örsan ŞenalpTopic: Unity of Science: Contributions from Bogdanov Link to log in: https://www.isss.org/members-mini-symposiums/Abstract:In this talk I will present the outline of the argument I develop in my ongoing research...
ISSS Book Club
Thursday, April 20, 2023
12:30pm to 2pm
The purpose of the book club is to explore the systems science literature in depth, so books are read over several months, with monthly reading assignments of approximately 50-100 pages....
ISSS Book Club
Thursday, May 18, 2023
12:30pm to 2pm
The purpose of the book club is to explore the systems science literature in depth, so books are read over several months, with monthly reading assignments of approximately 50-100 pages....

ISSS News Articles

ISSS 2023 South Africa - Registration Open
Posted on Jan 2nd, 2023
Registration for the ISSS 2023 Annual Meeting and Conference is now open. More details on the 2023 Conference webpage

Newsletter Signup


ISSS members are engaged in a number of activities around the world. Read more  at https://www.isss.org/activities/
Many member activities are collaborative in nature and also involve partnerships and collaborations with other organizations:
American Association for the Advancement of Science (AAAS)
International Council on Systems Engineering (INCOSE) Systems Science Working Group
Systems Literacy
Systemic Action at the Village Level to encourage and support sustainable development.

World of Systems

The ISSS is one of the oldest organizations dedicated to the study, development and application of systems science, systems thinking, cybernetics and complexity science. 
We are assembling lists of organizations, social network pages and groups, and also maps of the evolution of the field of systems and cybernetics. Here are some examples
Please email me with comments, additions or corrections. Peter D Tuddenham peterdtuddenham at gmail.com

Meeting Proceedings

We Remember

We Remember
Loet Leydesdorff 1948-11 March 2023
Tim Haslett - February 10 2023
John Friend - November 2022
Mick Ashby 1963 - October 2022
Klaus Krippendorf 1932 - October 2022
Ralph Stacey 1942 - 2021
Steven E Wallis July 29, 2021
James Robert Simms, December 5, 1924 - Saturday, May 22, 2021
Humberto Maturana 1929 - May 2021
Mary Catherine Bateson 1939 - 2 January 2021
Charles Bocage died 21 August 2020
Peter Caws  May 25, 1931 - April 20, 2020 (ISSS President 1966) 
Joe Simpson - June 2020
Jack Ring  - April 2020
Enrique Herrscher 2019
Charles Francois 2019

Systems Science & Applications Spotlight

Members of ISSS are researching and applying Systems Science in a variety of situations and circumstances. we are creating a temporary Editorial Board to decide what new research and application by ISSS Members to feature here. For more information please email webadmin@isss.org

AAAS Affiliate

In 1954 the founders of the current ISSS met at meetings of the American Association for the Advancement of Science (AAAS). They decided to start the Society for General Systems Theory later renamed Society for General Systems Research and now called the International Society for the Systems Sciences. One of the early group of founders and first presidents of our society in 1957,  Kenneth Ewart Boulding  was President of AAAS in 1980