The 500-year journey of the Codex Leicester from Da Vinci to Gates is also somehow emblematic of the sheer width of what we consider and acknowledge as ‘smart’. Da Vinci was the ultimate polymath: painter, sculptor, architect, musician, mathematician, engineer, inventor, anatomist, geologist, cartographer, botanist, writer—a man whose curiosity and imagination seemed to be truly boundless. Gates, on the other hand, has invented nothing; his company Microsoft has always been behind the curve with every new software application, from word processors and spreadsheets to the internet browser. In fact, even his first foray into business—a move that would in time make Microsoft the most powerful software company in the world for two decades—was based on an operating system that he bought cheap, reworked slightly and licensed to computer behemoth IBM (I am talking about MS-DOS, the programme at the heart of almost every PC even today). But with every novel development in the software applications area, Gates would come from behind, produce a competing product, often clunkier and less user-friendly than the original, and use a combination of razor-sharp business intelligence and the hammer-of-Thor blunt instrument of Microsoft’s market muscle to become the category leader, and in most cases, run the pioneer out of business. One could think of Da Vinci’s mirror writing as a symbol of how completely opposite—but equally potent—Gates’ spectacular intelligence is to the Renaissance man’s.