This paper explores the role of agreeableness, a key personality trait characterized by prosocial behaviors such as empathy, altruism, and cooperation, in conflict management and psychological adaptation in daily life. Agreeable individuals, driven by a focus on harmony and understanding, tend to employ constructive conflict resolution strategies that prioritize relational well-being and mutual respect. These strategies reduce interpersonal tensions, promote trust, and enhance relational satisfaction. Furthermore, agreeableness contributes significantly to psychological adaptation by fostering positive social interactions, enhancing emotional regulation, and promoting adaptive coping mechanisms, which together support resilience in the face of life’s challenges. The broader implications of agreeableness extend beyond individual relationships, influencing organizational dynamics, community engagement, and societal harmony by reducing conflict, fostering inclusivity, and bridging ideological divides. This paper highlights the importance of agreeableness in shaping both personal well-being and social cohesion, emphasizing its role in promoting a more empathetic, cooperative, and resilient society.