They are called historians lol
They discover, study, interpret and write HISTORY, so they are historians!
An objective that's common to both capitalism and socialism (and thus mixed economies) is production. Both systems rely on the production of goods and services (except that in capitalism one produces for profit and in socialism one produces for use--i.e. one produces according to human needs, not wants).
The line about "life, liberty, and the pursuit of happiness" is the most fitting
