Roosevelt had already found such interference necessary in the case of Germany and Venezuela. But it had been interference in a purely negative sense. He had merely insisted that the European power should not occupy American territory even temporarily. In the later case of the Dominican Republic he supplemented this negative interference with positive action based upon his conviction of the inseparable nature of rights and obligations.

Santo Domingo was in its usual state of chronic revolution. The stakes for which the rival forces were continually fighting were the custom houses, for they were the only certain sources of revenue and their receipts were the only reliable security which could be offered to foreign capitalists in support of loans. So thoroughgoing was the demoralization of the Republic's affairs that at one time there were two rival "governments" in the island and a revolution going on against each. One of these governments was once to be found at sea in a small gunboat but still insisting that, as the only legitimate government, it was entitled to declare war or peace or, more particularly, to make loans. The national debt of the Republic had mounted to $32,280,000 of which some $22,000,000 was owed to European creditors. The interest due on it in the year 1905 was two and a half million dollars. The whole situation was ripe for intervention by one or more European governments.

Such action President Roosevelt could not permit. But he could not ignore the validity of the debts which the Republic had contracted or the justice of the demand for the payment of at least the interest. "It cannot in the long run prove possible," he said, "for the United States to protect delinquent American nations from punishment for the non-performance of their duties unless she undertakes to make them perform their duties." So he invented a plan, which, by reason of its success in the Dominican case and its subsequent application and extension by later administrations, has come to be a thoroughly accepted part of the foreign policy of the United States. It ought to be known as the Roosevelt Plan, just as the amplification of the Monroe Doctrine already outlined might well be known as the Roosevelt Doctrine.

A naval commander in Dominican waters was instructed to see that no revolutionary fighting was permitted to endanger the custom houses. These instructions were carried out explicitly but without any actual use of force or shedding of blood. On one occasion two rival forces had planned a battle in a custom-house town. The American commander informed them courteously but firmly that they would not be permitted to fight there, for a battle might endanger the custom house. He had no objection, however, to their fighting. In fact he had picked out a nice spot for them outside the town where they might have their battle undisturbed. The winner could have the town. Would they kindly step outside for their fight. They would; they did. The American commander gravely welcomed the victorious faction as the rightful rulers of the town. So much for keeping the custom houses intact. But the Roosevelt Plan went much further. An agreement was entered into with those governmental authorities "who for the moment seemed best able to speak for the country" by means of which the custom houses were placed under American control. United States forces were to keep order and to protect the custom houses; United States officials were to collect the customs dues; forty-five per cent of the revenue was to be turned over to the Dominican Government, and fifty-five per cent put into a sinking fund in New York for the benefit of the creditors. The plan succeeded famously. The Dominicans got more out of their forty-five per cent than they had been wont to get when presumably the entire revenue was theirs. The creditors thoroughly approved, and their Governments had no possible pretext left for interference. Although the plan concerned itself not at all with the internal affairs of the Republic, its indirect influence was strong for good and the island enjoyed a degree of peace and prosperity such as it had not known before for at least a century. There was, however, strong opposition in the United States Senate to the ratification of the treaty with the Dominican Republic. The Democrats, with one or two exceptions, voted against ratification. A number of the more reactionary Republican Senators, also, who were violently hostile to President Roosevelt because of his attitude toward great corporations, lent their opposition. The Roosevelt Plan was further attacked by certain sections of the press, already antagonistic on other grounds, and by some of those whom Roosevelt called the "professional interventional philanthropists." It was two years before the Senate was ready to ratify the treaty, but meanwhile Roosevelt continued to carry it out "as a simple agreement on the part of the Executive which could be converted into a treaty whenever the Senate was ready to act."

The treaty as finally ratified differed in some particulars from the protocol. In the protocol the United States agreed "to respect the complete territorial integrity of the Dominican Republic." This covenant was omitted in the final document in deference to Roosevelt's opponents who could see no difference between "respecting" the integrity of territory and "guaranteeing" it. Another clause pledging the assistance of the United States in the internal affairs of the Republic, whenever the judgment of the American Government deemed it to be wise, was also omitted. The provision of the protocol making it the duty of the United States to deal with the various creditors of the Dominican Republic in order to determine the amount which each was to receive in settlement of its claims was modified so that this responsibility remained with the Government of the Republic. In Roosevelt's opinion, these modifications in the protocol detracted nothing from the original plan. He ascribed the delay in the ratification of the treaty to partisanship and bitterness against himself; and it is certainly true that most of the treaty's opponents were his consistent critics on other grounds.

A considerable portion of Roosevelt's success as a diplomat was the fruit of personality, as must be the case with any diplomat who makes more than a routine achievement. He disarmed suspicion by transparent honesty, and he impelled respect for his words by always promising or giving warning of not a hairsbreadth more than he was perfectly willing and thoroughly prepared to perform. He was always cheerfully ready to let the other fellow "save his face." He set no store by public triumphs. He was as exigent that his country should do justly as he was insistent that it should be done justly by. Phrases had no lure for him, appearances no glamour.

It was inevitable that so commanding a personality should have an influence beyond the normal sphere of his official activities. Only a man who had earned the confidence and the respect of the statesmen of other nations could have performed such a service as he did in 1905 in bringing about peace between Russia and Japan in the conflict then raging in the Far East. It was high time that the war should end, in the interest of both contestants. The Russians had been consistently defeated on land and had lost their entire fleet at the battle of Tsushima. The Japanese were apparently on the highroad to victory. But in reality, Japan's success had been bought at an exorbitant price. Intelligent observers in the diplomatic world who were in a position to realize the truth knew that neither nation could afford to go on.

On June 8, 1905, President Roosevelt sent to both Governments an identical note in which he urged them, "not only for their own sakes, but in the interest of the whole civilized world, to open direct negotiations for peace with each other." This was the first that the world heard of the proposal. But the President had already conducted, with the utmost secrecy, confidential negotiations with Tokyo and with St. Petersburg to induce both belligerents to consent to a face to face discussion of peace. In Russia he had found it necessary to go directly to the Czar himself, through the American Ambassador, George von Lengerke Meyer. Each Government was assured that no breath of the matter would be made public until both nations had signified their willingness to treat. Neither nation was to know anything of the other's readiness until both had committed themselves. These advances appear to have been made following a suggestion from Japan that Roosevelt should attempt to secure peace. He used to say, in discussing the matter, that, while it was not generally known or even suspected, Japan was actually "bled white" by the herculean efforts she had made. But Japan's position was the stronger, and peace was more important for Russia than for her antagonist. The Japanese were more clear-sighted than the selfish Russian bureaucracy; and they realized that they had gained so much already that there was nothing to be won by further fighting.

When the public invitation to peace negotiations was extended, the conference had already been arranged and the confidential consent of both Governments needed only to be made formal. Russia wished the meeting of plenipotentiaries to take place at Paris, Japan preferred Chifu, in China. Neither liked the other's suggestion, and Roosevelt's invitation to come to Washington, with the privilege of adjourning to some place in New England if the weather was too hot, was finally accepted. The formal meeting between the plenipotentiaries took place at Oyster Bay on the 5th of August on board the Presidential yacht, the Mayflower. Roosevelt received his guests in the cabin and proposed a toast in these words: "Gentlemen, I propose a toast to which there will be no answer and which I ask you to drink in silence, standing. I drink to the welfare and prosperity of the sovereigns and the peoples of the two great nations whose representatives have met one another on this ship. It is my earnest hope and prayer, in the interest not only of these two great powers, but of all civilized mankind, that a just and lasting peace may speedily be concluded between them."

The two groups of plenipotentiaries were carried, each on an American naval vessel, to Portsmouth, New Hampshire, and there at the Navy Yard began their conference. Two-thirds of the terms proposed by Japan were promptly accepted by the Russian envoys. But an irretrievable split on the remainder seemed inevitable. Japan demanded a money indemnity and the cession of the southern half of the island of Saghalien, which Japanese forces had already occupied. These demands the Russians refused.