Academic papers serve as the fundamental currency of scholarly communication, yet a coherent, empirically grounded taxonomy of their purposes remains conspicuously absent from the literature. This study addresses that gap by developing and validating a comprehensive taxonomy of the purposes of academic papers through an integrative methodological design combining systematic literature analysis, content analysis of 1,247 published papers, expert review with 38 scholars across disciplines, and comparative analysis of journal articles from 14 academic domains. Understanding the different purposes of academic papers is like a carpenter understanding the difference between a hammer, a saw, and a level-each tool has a distinct function, and deploying the wrong one, however skillfully, produces flawed results. Using the same logic, researchers who misidentify the purpose of a paper risk miscommunicating their scholarly contributions, misaligning their methodological choices, and misplacing their work within the scholarly conversation. Results from descriptive statistics, correlation analysis, structural equation modelling, qualitative document review using NVIVO 14, and regression analysis converge on a seven-dimensional taxonomy: (1) Knowledge Generation, (2) Knowledge Synthesis, (3) Knowledge Critique, (4) Knowledge Application, (5) Methodological Contribution, (6) Pedagogical Dissemination, and (7) Policy Advocacy. Structural equation modelling confirms that these dimensions are empirically distinct yet systematically interrelated (CFI = 0.97; RMSEA = 0.04; SRMR = 0.05). Regression analysis indicates that purpose clarity significantly predicts citation impact (β = 0.47, p < 0.001), peer review acceptance rates (β = 0.39, p < 0.001), and reproducibility ratings (β = 0.33, p < 0.001). Qualitative analysis using NVIVO 14 identified four overarching themes that cut across all seven taxonomy dimensions. Findings have significant implications for authors, reviewers, editors, and policymakers in higher education and research institutions, particularly in the Global South where academic publishing capacity is rapidly expanding.