根据所给中文完成句子：
In the early 1950’s historians who studies _____Europe (which we may define here as Europe in the period from roughly 1300 to 1800) began, for the first time in large numbers, to______more of the preindustrial European population than the 2 or 3 percent who _____ the political and social elite (精华) : the kings, generals, judges, nobles, bishops, and local magnates (要人) who had hitherto (迄今) usually filled history books.
[参考译文]早在20世纪50年代，许多研究前工业时代欧洲（我们可将其粗略定义为1300年至1800年间的欧洲）的历史学家们开始研究更多的欧洲人群，而不仅仅局在只占人口总数2％到3％的那些至今还充斥着历史书籍的政治、社会、精英人物：国王、将军、法官、贵族主教和地方要人。
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