Behold a marvel of human engineering, such as the Empire State Building or the Golden Gate Bridge. Think of how much ingenuity went into erecting that structure. Consider the extensive effort required to develop the tools and materials; the detailed knowledge of engineering, metallurgy, and technology. These systems were refined over decades through meticulous research and experimentation.
The structure you see is the cumulation of the labor of thousands of individuals, their knowledge, their expertise, their creativity. Not only the ones who participated in the building itself, but all those who preceded them—who developed and produced the materials, and who originally discovered the engineering and architectural principles applied to the building process.
