Upon the fertile soil of history, human civilization grows like a mighty tree. People's understanding of the world keeps improving, like increasingly robust roots providing continuous nourishment for the growth of civilization. Meanwhile, the development of technology climbs upwards, akin to the dense canopy of a tree reaching for the sunlight, always branching and specializing.
To Xiulote, the progress of human technology was a network shaped like a tree. Many technologies advanced in a straight line, requiring predecessors to lay the foundation. For example, the hydraulic machinery of Europe during this era required advanced iron-refining technology as a prerequisite because copper and bronze lacked the tensile strength and elasticity to serve well as mechanical parts, such as easily damaged springs.
