In regard to current and future relations between the two political systems across the Taiwan Strait, many scholars, officials, and party leaders of various countries have put forward various models, projections, and policy recommendations. The purpose of this essay is to review and evaluate the content and applicability of these models, projections, and policy recommendations both from a social-science perspective and from a practical concern of their utilities as methods of resolving cross Strait conflicts. Included in the reviewed models and conceptual frameworks are the theoretical constructs coined by the author of this essay, i.e., the ”Multi-System Nation,” ”Linkage Communities,” and ”Intra-National Unions.” Suggestions for further research on the subject matter are offered in the last part of the essay with theoretical and methodological questions posed as the foci of future contemplation and deliberation.