What is centrality and periphery in global history? It turns out that graph theory, formal network analysis, is all about finding ways to calculate centrality in graphs. How then to make the link between graph theory and historical networks?

[HD, English Subtitles and Chapters available]

Keynote lecture given during the international conference "Cultural Organizations: Between the Local and the Global (1880s1960s)" on November 18 (2020) at the Universitat Oberta de Catalunya, Barcelona.

Contents
00:00 Foreword
01:18 Introduction: Intellectual cooperation
03:42 Introduction: Centralities and peripheries
07:04 Introduction: Scaling
08:16 Graph theory: An example
10:42 Graph theory: Contextualize a relationship
11:45 Graph reading
13:54 Centrality measures
15:58 Introduction to historical networks
18:48 The network of Intellectual cooperation
21:36 Analysis scenarios
24:15 Modeling a multilayer system
26:58 Creating an institutional topography
28:20 Multilayer analysis of the networks of Marie Curie and Albert Einstein
29:37 Calculating graph metrics
32:15 New facets: time and themes
34:06 Conclusion
36:04 References

The visualizations used in this presentation come from the following publications:
Grandjean, Martin, « A Conceptual Framework for Multilayer Historical Networks », Workflows for the Digital Humanities, DARIAHCH Proceedings, 2020. PDF: https://halshs.archivesouvertes.fr/h...
Grandjean, Martin and Jacomy, Mathieu, « Translating Networks: Assessing Correspondence Between Network Visualisation and Analytics », in Digital Humanities 2019, Utrecht, 2019. PDF: https://halshs.archivesouvertes.fr/h...
Grandjean, Martin, Les réseaux de la coopération intellectuelle. La Société des Nations comme actrice des échanges scientifiques et culturels dans l’entredeuxguerres, Lausanne : Université de Lausanne, 2018, 600 p. PDF: https://halshs.archivesouvertes.fr/t...
Grandjean, Martin, « Analisi e visualizzazioni delle reti in storia. L’esempio della cooperazione intellettuale della Societa delle Nazioni », Memoria e Ricerca, 55, 2, 2017, p. 371‑393. French PDF: https://halshs.archivesouvertes.fr/h...

Data is accessible and reusable:
Grandjean, Martin, The Network of Intellectual Cooperation, Data set, 2018, github.com/grandjeanmartin/intellectualcooperation (DOI 10.5281/zenodo.1257287).