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Fragmentation versus stability in bimodal coalitions


  • Galam, Serge


Competing bimodal coalitions among a group of actors are discussed. First, a model from political sciences is revisited. Most of the model statements are found not to be contained in the model. Second, a new coalition model is built. It accounts for local versus global alignment with respect to the joining of a coalition. The existence of two competing world coalitions is found to yield one unique stable distribution of actors. On the opposite a unique world leadership allows the emergence of unstable relationships. In parallel to regular actors which have a clear coalition choice, “neutral”, “frustrated” and “risky” actors are produced. The cold war organisation after world war II is shown to be rather stable. The emergence of a fragmentation process from eastern group disappearance is explained as well as continuing western group stability. Some hints are obtained about possible policies to stabilize world nation relationships. European construction is analyzed with respect to European stability. Chinese stability is also discussed.

Suggested Citation

  • Galam, Serge, 1996. "Fragmentation versus stability in bimodal coalitions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 230(1), pages 174-188.
  • Handle: RePEc:eee:phsmap:v:230:y:1996:i:1:p:174-188
    DOI: 10.1016/0378-4371(96)00034-9

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    References listed on IDEAS

    1. Axelrod, Robert & Bennett, D. Scott, 1993. "A Landscape Theory of Aggregation," British Journal of Political Science, Cambridge University Press, vol. 23(2), pages 211-233, April.
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    Cited by:

    1. Vinogradova, Galina & Galam, Serge, 2013. "Rational instability in the natural coalition forming," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 392(23), pages 6025-6040.
    2. Sun, Yixiang & Du, Haifeng & Gong, Maoguo & Ma, Lijia & Wang, Shanfeng, 2014. "Fast computing global structural balance in signed networks based on memetic algorithm," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 415(C), pages 261-272.
    3. Le Breton, Michel & Weber, Shlomo, 2009. "Existence of Pure Strategies Nash Equilibria in Social Interaction Games with Dyadic Externalities," CEPR Discussion Papers 7279, C.E.P.R. Discussion Papers.
    4. Guodong Shi & Alexandre Proutiere & Mikael Johansson & John S. Baras & Karl H. Johansson, 2016. "The Evolution of Beliefs over Signed Social Networks," Operations Research, INFORMS, vol. 64(3), pages 585-604, June.
    5. Kurmyshev, Evguenii & Juárez, Héctor A. & González-Silva, Ricardo A., 2011. "Dynamics of bounded confidence opinion in heterogeneous social networks: Concord against partial antagonism," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 390(16), pages 2945-2955.
    6. Claudio Altafini, 2012. "Dynamics of Opinion Forming in Structurally Balanced Social Networks," PLOS ONE, Public Library of Science, vol. 7(6), pages 1-9, June.
    7. Galam, Serge, 2004. "Sociophysics: a personal testimony," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 336(1), pages 49-55.
    8. Belaza, Andres M. & Ryckebusch, Jan & Bramson, Aaron & Casert, Corneel & Hoefman, Kevin & Schoors, Koen & van den Heuvel, Milan & Vandermarliere, Benjamin, 2019. "Social stability and extended social balance—Quantifying the role of inactive links in social networks," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 518(C), pages 270-284.

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