Digital campaigns have evolved from banner ads 20 years ago to Cambridge Analytica harvesting our Facebook data. Has the rise of micro-targeting become a threat to democracy? Alan Gould was hitting a wall. It was the late 1990s, and the political advertising operative had an idea about using a relatively newfangled tool banner ads on web sites to promote political candidates. It was pretty clear to me at the time that the ability to target…"‘It might work too well’: the dark art of political advertising online"