Several conclusions were found in this study. The data analysis supported the hypothesis that the principal’s leadership style was related to school outcomes. This relationship is found to be direct and indirect through the school environment. In the USA schools, the integrative principal leadership style is found to encourage and create a cooperative school environment for better school outcome than schools with authoritative principals. The principal’s leadership style was found to be very different between Kuwait and USA school. Kuwait schools’ principals are authoritative in their leadership style, while their USA counterparts tend to be integrative. Interestingly, although Kuwait school principals are authoritative in nature, data indicated that a cooperative school environment showed higher school outcomes. This suggests that the USA model is inapplicable in a culture similar to Kuwait. This study also concludes that there are no universal or appropriate leadership styles for all cultures.