Legalist School of the Warring States Period (475-221 BC) founded by Han Fei 韓非|韩非[Hán Fēi] and Li Si 李斯[Lǐ Sī], which influenced Shang Yang 商鞅[Shāng Yāng], whose reforms strengthened the Qin state 秦國|秦国[Qín guó], eventually enabling it to conquer rival states and unify China under the Qin dynasty 秦朝[Qín cháo]