Sustainability has become the latest global buzzword. Intangibles are key elements in supporting sustainability, such as intellectual capital (IC), including knowledge, technology, and human talents. Over the past few decades, intellectual capital research has proliferated to maturity. Introducing how organizations and governments can utilize IC research results to become more sustainable and proposing the next stage of IC research are the main purposes of this study. This chapter first briefly describes the evolution of IC research. Afterward, a sustainable national intellectual capital (SNIC) model with a special focus on health, connectivity, and sustainability is introduced. Furthermore, country comparisons reveal that 12 out of the top 15 countries of SNIC overlap with those of IMD World Competitiveness. Particularly, four small countries, Denmark, Switzerland, Netherlands, and Singapore, are in the top five in both SNIC and IMD ranking, indicating good targets for future IC research. The public structure has the greatest explaining power for GDP. Graphs and trajectories are mapped based on SNIC vs. GDP. This chapter contributes to the futurizing of IC theory with IC ecosystems and futurizing IC practices through the SNIC model. They provide guidelines for utilizing SNIC data for the purposes of enhancing national intangible assets and proposing a more comprehensive IC field of research.