The inherent threat in the evolution of our living places – As we generate more data, and as we combine and analyze these data, privacy concerns increase. These data can provide valuable insights to help us manage the complex nature of our growing population and urbanization needs. We should not, and cannot, allow this pressing need for efficiency to undermine our privacy, though. Privacy is sacrosanct and, once lost, hard, if not impossible, to reclaim. As individuals, as organizations, as government bodies, we all need to understand and appreciate what data privacy means. We can make smarter cities, but, in doing so, we must also build in both technical and legislative structures that defend our privacy. Our next big step in human history needs to land on solid ground.