Research Tool

I just found a useful tool that could help organize some of the information here:

Time Toast

https://www.timetoast.com/

Here's an example of what you might find there:

History of Direct-to-Consumer Pharmacuetical Advertising

https://www.timetoast.com/timelines/history-of-direct-to-consumer-pharmacuetical-advertising

It looks like people can sign up and post their own timelines.