Who can Damage Severely to the World Economy? COVID-19 vs. Russian-Ukrainian War Mario Arturo Ruiz Estrada The Centre of Latin American Studies (CLAS) University of Malaya 50603 Kuala Lumpur, Malaysia Email: marioruiz@um.edu.my Tel: +60-126850293 & University of Economics and Human Sciences Okopowa 59, 01-043 Warszawa, Poland E-mail: m.ruizestrada@vizja.pl Abstract This paper shows a new methodology to observe mathematically and graphically the vulnerability of the world economy in case of a pandemic (COVID-19) or war (Russian-Ukraine War). The main objective of this research is to evaluate the economic damage levels generated from war or pandemics in the short run. The economic damage in this research is taking form in the shape of a possible production collapse, trade dispute, investment disruption, energy shortage, or financial crisis. This research assumes that the world economy always is influenced by five global forces' behavior simultaneously. These are the economic global forces behavior; social global forces behavior; political global forces behavior; technological global forces behavior; natural global forces behavior. Hence, the five global forces behavior. These five global forces' behavior keeps a constant interaction and change qualitative and quantitatively together in time and space. At the same time, the five global forces' behavior always has a strong influence on the world economy's vulnerability without any constraints. Finally, we will evaluate how much economic damage can generate the COVID-19 and the Russian-Ukrainian war on the world economy. Keywords: Pandemics, war, COVID-19, Russian-Ukrainian war, policy modeling JEL: A1 1. Introduction This paper is willing to explain the complex and dynamic behavior of the world economy from a multi-dimensional perspective (Ruiz Estrada and Park, 2018). We assume that we have five global forces behavior interacting simultaneously and affecting the world's economic behavior. The five global forces behavior is the economic global forces behavior; (ii) social global forces behavior; (iii) political global forces behavior; (iv) Technological global forces behavior; (v) Natural global forces behavior. Hence, the five global forces' behavior always keeps in a constant quantitative and qualitative transformation(s) across time and space. We also assume that the world economy always is in constant chaos and non-under control events