One of the most effective instruments for peace is the Monroe Doctrine as it has been and is being gradually developed by this Nation and accepted by other nations. No other policy could have been as efficient in promoting peace in the Western Hemisphere and in giving to each nation thereon the chance to develop along its own lines. If we had refused to apply the Doctrine to changing conditions it would now be completely outworn, would not meet any of the needs of the present day, and indeed would probably by this time have sunk into complete oblivion. It is useful at home, and is meeting with recognition abroad because we have adapted our application of it to meet the growing and changing needs of the Hemisphere. When we announce a policy, such as the Monroe Doctrine, we thereby commit ourselves to the consequences of the policy, and those consequences from time to time alter. It is out of the question to claim a right and yet shirk the responsibility for its exercise. Not only we, but all American Republics who are benefited by the existence of the Doctrine, must recognize the obligations each nation is under as regards foreign peoples no less than its duty to insist upon its own rights. That our rights and interests are deeply concerned in the maintenance of the Doctrine is so clear as hardly to need argument. This is especially true in view of the construction of the Panama Canal. As a mere matter of self-defence we must exercise a close watch over the approaches to this canal; and this means that we must be thoroughly alive to our interests in the Caribbean Sea.