"17th century (Western) philosophy" . . . . "the 17th century" . . . "17th century" . . "philosophy of the 17th century" . . . . "17th" . "Age of Reason" . . . . . "17th-" . . . . . . "Reason" . . "17th-century philosopher" . . . . . . . . . . . "Early Modern philosophers" . . "17th-century philosophy" . . "17th-century philosophers" . . . "17th-century philosophy" .