While there is no point in Cuba's history that may be said to mark a definite division between the Old Cuba and the New Cuba, the beginning of the 19th Century may be taken for that purpose. Cuba's development dragged for two hundred and fifty years. The population increased slowly and industry lagged. For this, Spain's colonial policy was responsible. But it was the policy of the time, carried out more or less effectively by all nations having colonies. England wrote it particularly into her Navigation Acts of 1651, 1660, and 1663, and supported it by later Acts.