“People who may mean well promote and enact measures that produce results they neither intended nor anticipated. The explanation for this discrepancy between what is planned for and what results can be found in the study of chaos, or complexity. The ability to predict outcomes is dependent upon an awareness of all factors influencing events. With complex systems, however, such complete knowledge is always unobtainable, meaning that there will always be information loss that will produce unforeseen consequences. This distortion increases with the passage of time.
The hubris that motivates some people to use the power of the state to impose their well-intended visions upon others derives, in part, from an ignorance of the inherent uncertainties that are embedded in complex systems. Arrogance is grounded in the unstated assumption that one’s understanding is so complete as to render their actions infallible.”
— Butler Shaffer - The Unintended Consequences of Good Intentions