In the twenty-first century, human cognition is shaped by informational conditions more rapidly and intensely than ever before. Algorithms filter what people see, digital platforms deliver continuous emotional and sensory cues, and attention is constantly recruited by external systems. These shifts reveal that cognition does not begin with conscious thought but with the informational processes that precede it. In this book, Dr. Raja Gunreddy presents the Information-Primacy Thought Theory (IPTT), a framework that reconceptualizes thought as the final output of a deeper informational chain. IPTT argues that information-not thought-is the true origin of mental activity, and that modern environments have transformed the quality, density and emotional charge of information that the mind must process long before awareness occurs. IPTT traces the full progression from sensory energy activation to conscious cognition. Thought forms only after the brain has encoded signals, extracted patterns, created symbolic representations, constructed meaning, anchored context and filtered relevance. Many experiences of overwhelm, cognitive distortion or emotional turbulence arise not from irrational thinking but from disruptions occurring earlier in this informational sequence. Continuous digital stimuli, fragmented context and AI-amplified emotional cues reshape these upstream processes, exerting profound influence over how thought emerges. IPTT integrates neuroscience, predictive processing and information science to explain how environmental input shapes cognitive architecture before thought appears. Building on this theory, Dr. Gunreddy introduces IRIT (Information-Regulation and Input Therapy), an upstream clinical model designed to modify the informational conditions that generate thought. While cognitive-behavioral, metacognitive, schema-based and psychodynamic therapies intervene after thoughts form, IRIT focuses on stabilizing sensory load, regulating input density, reducing emotional saturation, supporting contextual coherence and strengthening relevance filters. This allows thought-based therapies to work more effectively by reducing the upstream turbulence that continually produces cognitive distortions. The book also establishes the first research framework for an information-first cognitive science, outlining experiments on input quality, sensory load, information density and input purity. New measurement tools-including the Cognition Coherence Index, Input Purity Score and Cognitive Stability Scale-provide ways to quantify informational and cognitive stability in both laboratory and real-world contexts. Positioning IPTT as a model for the next era of mind science, the book shows how informational ecosystems increasingly shape emotion, attention, learning and reasoning. IPTT offers new directions for education, mental health and AI-human interaction by treating cognition as the downstream expression of informational systems. Through this work, Dr. Raja Gunreddy provides a transformative framework for understanding the mind in an age where information precedes thought.