Monopoly capital had its beginnings, it is generally agreed, in the last two or three decades of the nineteenth century. It was then that the concentration and centralization of capital, in the form of the early trusts, cartels, and other forms of combination, began to assert itself; it was consequently then that the modern structure of capitalist industry and finance began to take shape. At the same time, the rapid completion of the colonization of the world and the international rivalries and armed clashes over the division of the globe into spheres of economic influence or dominance opened the modern imperialist era. Monopoly capitalism thus embraces the increase of monopolistic organizations within each capitalist country, the internationalization of capital, the international division of labor, imperialism, the world market and the world movement of capital, and changes in the structure of state power.