Naturalism is a philosophy that separates nature from God and focuses on developing personality to make a child a "natural man." It believes the child's personality is disintegrated through attempts to make them cultured and civilized. According to naturalism, education should follow the natural development of the child through experiences with nature, senses as the gateway to knowledge, and an activity-based curriculum. However, it is criticized for making children unsocial and unprepared for future life by ignoring spiritual development and future needs.