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100 Years of the International Union for Pure and Applied Physics

The International Union for Pure and Applied Physics (IUPAP) celebrates its centenary this year, but its beginnings were far from easy. Roberto Lalli and Jaume Navarro reflect on IUPAP’s evolving role in promoting international cooperation.

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Fig. 1: The first President and Secretary General of the International Union for Pure and Applied (IUPAP).


  1. Bohr to Abraham, 12 December 1934. In IUPAP archives, Quebec Secretariat, subseries E1, box 5, folder 38 (1934).

  2. Statement by the International Union of Pure and Applied Physics on the Events Occurring in Ukraine (IUPAP, 2022);

  3. IUPAP Resolution Regarding International Conferences in this Time (IUPAP, 2022);

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Correspondence to Roberto Lalli.

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Lalli, R., Navarro, J. 100 Years of the International Union for Pure and Applied Physics. Nat Rev Phys 4, 568–569 (2022).

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