In the present inquiry the anthropological problem is this: As religious wars are admitted to be the most intense, most idealistic, and most sacrificial of all wars, and therefore most difficult to stop, can it be ascertained just how the Thirty Years' War, culminating in the peace of Westphalia, brought about the end of all religious wars? This might suggest how all political wars may be made to cease. If the seventeenth century accomplished the more difficult task, the peace conference at Paris ought to succeed in the less difficult one. If the twentieth century prides itself on being superior in diplomacy, practical statesmanship, and general mental caliber, it will now have an opportunity to show such superiority by formulating a treaty which will make all future political wars not only improbable but impossible. PRINCIPLES OF A PEACE CONFERENCE. In following the present peace conference and comparing it with the peace congress of Westphalia, it may be well to mention a few of the principles of such congresses in general. In a treaty of peace there are first of all the usual articles, as, e.g., a declaration that peace is restored and amnesty clauses, including restitution of such conquests as are not intended to be retained, and of rights suspended by the war. Also there are provisions to remove the causes out of which the war arose, redress grievances, and prevent their recurrence. This is the most essential thing for the congress to do. Then there is the indemnity article to make satisfactory reparation for injury sustained and cost of war. But great prudence should be exercised here, otherwise the conquered power may feel deep resentment which is liable to sow seeds for a future war. As to personal attendance at the congress, one great advantage is that difficulties thought insurmountable in correspondence often disappear in an interview. Half the work is done when members have come to know what each really wants. But in long discussions there is danger of becoming fatigued and making ill-advised concessions. There is also temptation for some members to interfere where they have no substantial interests nor rights, and to contract engagements in which they have no special concern. When strong enough, every nation will insist on the right to manage its own internal affairs. Sometimes there are a few particularly able men, speaking several languages fluently (a very practical advantage), but representing only small countries, who may exercise undue influence and cause the congress to authorize things which may not prove of equal justice to all. Members of congresses have been known to vote for things that they did not understand, to the great disadvantage of their own country, due mainly to inexperience and lack of familiarity with the language spoken in the congress. THE PEACE OF WESTPHALIA.