Technology used to be a lot more accessible, open, and ethical. It was driven by optimistic tinkerers rather than big companies. That changed. The entire industry and ecosystem is now ruled by a handful of companies rather than upstarts. American tech giants are now among the most powerful institutions in the world, rivaling governments in their power over media, culture, and politics. Jonathan Taplin, whose book Move Fast and Break Things offers a succinct and powerful history of how online life began to be shaped around the values of the men who founded these companies, and Farhad Manjoo, tech writer for The New York Times, discuss the tech giants’ growth and impact, and whether it’s time for lawmakers and regulators to curb their power.