But while our command of the sea was not disputed in deed by the Germans, it was disputed in word by domestic critics and denied by loquacious generals; and the exploits of German submarines, airships, and aeroplanes lent some colour to the denial and to the assertion that England had ceased to be an island. Both contentions were the outcome of inadequate knowledge and worse confusion of thought. Islands are made by the sea and not by the air; even if the Germans had secured command of the air, which they did not, that command would not have given them the advantages which accrue from the command of the sea. It might please pessimists to believe that England would be cowed into submission by air-raids, but the most inveterate scaremongers hesitated to assert that armies with their indispensable artillery and equipment could be dropped on British soil from the skies. Belgium and France were far more troubled than we by aircraft; but it was not aircraft that carried German armies to Brussels and near to the gates of Paris, and London was saved from the fate of Louvain by British command of the sea. Nor was that command abolished or even threatened by submarines, and the fear lest it was came of the mentality which denies the existence of a power on the ground that it is not perfect. Command of the sea never has been and never can be absolute. French privateers had never been more active nor British losses at sea more acute than after Trafalgar, when no French Navy ventured out of port; and the destruction of every German Dreadnought would not have affected by one iota the success of German submarines.