I may not be good in answering this question, but what I think is History is neither a subject of just Arts or just a social science but it's a subject of “Evolutionary Science”.
And all the fields like Arts, social science etc are some how has its history… and is a result of Evolution.
Let's talk about Food human eat. Man first observed seeds and all the processes like sprouting, germination, growing, multiplying etc, and then started agriculture, studied which plants to grow and how, which is to eat and which is not, which is poisonous and which has medicinal values….
Though we take it as granted now a days, we don't even think of these things like whether we should go for eat this thing or not, right. This was only about the food and it's evolution but its all a science. Be it, human evolution or earth formation or life its just everything is a science, an “evolutionary science”. And everything has its history… its a continuous process.
Arts, history, geography, economy, polity, psychology, sociology, commerce, or science etc are such a small words, they all are the branches of a single tree I'd say, and the name of that tree is “evolutionary science”.
Stay blessed stay happy and let's enjoy being a part of this process of “evolutionary science”.
Love from ___Tejaswita