Professor Christians writes extensively on any number of topics related to international taxation in a globalized world, but it was her work on the tax issues of US citizens and US persons abroad that caught my attention and made me a faithful reader of her blog Tax, Society and Culture.
If you'd like to get better acquainted with her work, she has quite a few papers up on SSRN. Here are a few titles I encourage you to read if you are interested in a very informed and very thoughtful perspective that may have you thinking a bit differently about the American Diaspora Tax War.
Uncle Sam Wants … Who? A Global Perspective on Citizenship Taxation (2016)
Paperwork and Punishment: It's Time to Fix FBAR (2014)
Drawing the Boundaries of Tax Justice (2013)
Fair Taxation as a Basic Human Right (2009)