Focusing on one specific academic field? This question has already been asked, albeit not so much, in this thread. This, however, still gets me thinking. I am an early career research (not even done with my PhD yet). A PhD candidate told me that despite all my papers being focused in one country, I am "all over the place." Meaning, my published works are in different fields (i.e. sociolinguistics, politics, anthropology, international relations) - all of which I have a good grasp with. What is common among all my publications are my ideological standpoints. I remained consistent.

My degrees are in area studies, and I did (and still does) all the researches for my degrees in the fields of sociolinguistics, the politics of language, and political rhetoric. Area Studies is so broad enough that it can be considered multi- and interdisciplinary. 

However, will writing and being able to have my works published in various fields in the social sciences affect my profile (positively or negatively) when I apply for faculty positions in the future?
To give a general answer: If you can show you have a significant, long-running research agenda, i.e. if you can bind the different publication or most of them with a single narrative - than it's probably ok. Of course, expectations depend by field, country etc.