With Ieyasu in control, peace descends on Japan, and a new society based on the samurai ethics of obedience and loyalty is established. In 1600, William Adams becomes the first Englishman to set foot in Japan. Impressed by European trading vessels, Ieyasu asks Adams to help him build his own fleet. Aware that the English have no interest in converting the Japanese to Christianity, Ieyasu decides to expel the Portuguese and Spanish, who too often combine missionary work with trade. When he dies at 72, Ieyasu's vision of a strictly controlled class system based on the rule of the samurai is a reality. But his grandson, Iemitsu, will rule more harshly. With no wars to fight, Iemitsu tightens control over the power and movement of the daimyo and their restless samurai armies. Though foreign missionaries have been expelled, Iemitsu still fears the influence of Christianity. In 1637, impoverished peasants and persecuted Christians explode in anger in the Shimabara Rebellion, and thousands die. In order to prevent further dissention resulting from foreign influence, Iemitsu closes Japan to the western world. It will be more than 200 years before the nation will open its doors again.