In the eyes of Travis Kalanick, Uber’s co-founder and chief executive, the entire system was rigged against startups like his. Like many in Silicon Valley, he believed in the transformative power of technology. His service harnessed the incredible powers of code—smartphones, data analysis, real-time GPS readings—to improve people’s lives, to make services more efficient, to connect people who wanted to buy things with people who wanted to sell them, to make society a better place.