In 1997, she wroteClose to the Machine, the now classic and still definitive account of life as a coder at the birth of what would be a sweeping technological, cultural, and financial revolution.The intervening twenty years has seen, among other things, the rise of the Internet, the ubiquity of once unimaginably powerful computers, and the thorough transformation of our economy and society—as Ullman’s clique of socially awkward West Coast geeks became our new elite, elevated for and insulated by a technical mastery that few could achieve.In Life in Code, Ullman presents a series of essays that unlock and explain—and don’t necessarily celebrate—how we got to now, as only she can, with a fluency and expertise that’s unusual in someone with her humanistic worldview, and with the sharp insight and brilliant prose that are uniquely her own. Life in Code is an essential text toward our understanding of the last twenty years—and the next twenty.

    In 1923, with its currency effectively worthless (the exchange rate in December of that year was one dollar to 4,200,000,000,000 marks), the German republic was all but reduced to a barter economy. Expensive cigars, artworks, and jewels were routinely exchanged for staples such as bread; a cinema ticket could be bought for a lump of coal; and a bottle of paraffin for a silk shirt. People watched helplessly as their life savings disappeared and their loved ones starved. Germany’s finances descended into chaos, with severe social unrest in its wake. Money may no longer be physically printed and distributed in the voluminous quantities of 1923. However, “quantitative easing,” that modern euphemism for surreptitious deficit financing in an electronic era, can no less become an assault on monetary discipline. Whatever the reason for a country’s deficit necessity or profligacy, unwillingness to tax or blindness to expenditure it is beguiling to suppose that if the day of reckoning is postponed economic recovery will come in time to prevent higher unemployment or deeper recession. What if it does not? Germany in 1923 provides a vivid, compelling, sobering moral tale.