This week marks an important moment in the history of digital advertising as the U.S. Department of Justice presses its case that Google is a monopolist in ad tech.  The seeds of this case were planted in 2007, when Google bought DoubleClick, a critical piece of internet advertising infrastructure that was widely used by advertisers and publishers in running ad campaigns. With DoubleClick in the fold, Google methodically grew to dominate all phases of digital advertising by piecing together a full stack solution for ad tech, supplying the tools used to both buy and sell ads as well as the exchange used for transacting. And Google was the biggest source of demand for the exchange. The go-to comparison of this situation is if Goldman Sachs owned the New York Stock Exchange. On this week’s episode of The Rebooting Show, I spoke to Ari Paparo, a former DoubleClick executive and ad tech veteran who now runs Marketecture. Ari, in addition to being the funniest person in ad tech, knows the history. We go back in time to when the Google-DoubleClick deal took place, just as programmatic advertising was becoming a reality, and get into the weeds about why controlling the plumbing of digital advertising created an unavoidable set of misaligned incentives.