What do we mean by liberalism or liberal history? It seems that every scholar in the social sciences would like to define liberalism in their own way.
Certainly there is plenty of room for differences of opinion on this matter.
But defining any -ism requires circumscribing a set of beliefs or drawing lines in such a way as to connect ideas that we believe form a coherent tradition.
Liberal history is primarily concerned with ideas and with the reasons why individuals acted as they did.