In effort to learn social sciences the biggest hurdle comes in between is the dates and the works of some people who wasn't that known to us before they appeared in our syllabus, So the best way should only be to learn about those people with our will to know great things that changed the present of your's by the work of their's in past, or in short the best way to memorise the dates and the works in correspondence with their names is to know the importance of what they did and respect what you at willing to remember, that's it try it once it really did help me in my school days.