The exportation of laborers and capital from old to new countries . . . adds to the joint wealth of the old and the new country . . . There needs be no hesitation in affirming that Colonization, in the present state of the world, is the best affair of business, in which the [wealth] of an old and wealthy country can engage.'
- 'Principles of Political Economy' by John Stuart Mill, 1848
Based on the excerpt, what was Mill's perception of colonialism?