In  a  striking  passage  of  Book  Fifth,  one  of  the  interlocu-
tors in  the  dialogue  says,  in  speaking  of  war  and  its  ordinary
results :  "  First,  concerning  enslavement,  does  it  appear  to  you
just  that.  Greeks  should  enslave  Greek  cities  ?  or  that  they
should  do  their  best  even  to  prevent  others  from  doing  so,  and
accustom  them  to  spare  the  Greek  race,  guarding  it  against  be-
ing enslaved  by  the  barbarians  ?  "  "  Absolutely  and  entirely,
it  is  best  to  spare  them."  "  And  not  to  possess  Greek  slaves
themselves,  and  to  advise  the  other  Greeks  so  too  ?  "  "  Cer-
tainly they  would  then  turn  more  to  the  barbarians,  and  abstain
from  one  another."  Here  the  non-enslavement  of  Greeks  is
recommended,  but  rather  from  motives  of  prudence  than  from
any  fundamental  objection  to  slavery  as  such.  Wallon  is  mis-
taken in  saying  that  Plato  recognizes  the  natural  injustice  of
this  destiny.
