Since 2004, the Conference on Complex Systems organized by the CSS, is the most important annual meeting for the complex systems research community. Until 2014, it was the European Conference on Complex Systems. In 2015, it became CCS with its first « global » edition in the USA. In 2016, CCS came back to Europe and took place in Amsterdam, Netherlands. In 2017, CCS was organized in Cancun, Mexico, for its first edition in Latin America.
CCS2018 was organized in Thessaloniki, Greece.
CCS was organized in Asia for the first time in 2019: it took place in Singapore.

The CCS steering committee, elected among the members of the Complex Systems Society, is responsible for the development and support of the CCS conference series.

CCS2020 will take place online on Dec. 7-12.