Type the name of almost any successful consumer web company into your search bar and add the word “addict” after it. Go ahead, I’ll wait. Try “Facebook addict” or “Twitter addict” or even “Pinterest addict” and you’ll soon get a slew of results from hooked users and observers deriding the narcotic-like properties of these web sites. How is it that these companies, producing little more than bits of code displayed on a screen, can seemingly control users’ minds? Why are these sites so engaging and what does their power mean for the future of the web?