Abstract

National power is the basis of the current competition and game betweenglobal sovereign states. It is the organic integration and concentratede-x-p-r-e-s-s-i-o-n of the multi-dimensional and complex factors of politics, econ-omy, society, culture, ecology, value system, and history of any country.Due to the complexity of national power and the non-objectivity of theassessment, the concept of national power and assessment must be con-structed using multiple levels of evidence. Therefore, this paper constructsa three-level evidence chain national power index system based on the sys-tematic literature review, public value theory, and expert scoring, andtakes the G20 countries as an example to measure the change and motiveforce of national power of the major countries in the world from 1992 to2017. Research shows that national power is fundamentally dependent onthe creation of multiple public values, and the trend of“weak countriesgetting weaker and strong countries getting stronger”among countries hasstrengthened. The increase of national power in different types of valuepower is not synchronous, but there are key points and outstandingimprovements.