Firstly, not only do you need to understand which subject you are writing about, but also have knowledge of the biggest landmarks as well as more recent developments in the field. (weeklyessay.com)
Just because we don't have answers to something that occurred further back doesn't mean things we've learned about more recent developments are not true. (religion.blogs.cnn.com)
If that seems unfair or hash consider more recent developments. (slaw.ca)