It means to alter the world systematically. It is a moral, social and political matter. And it needs equally dramatic justification. The transformation may be in harmony with the essential development of the human race. Or, it may be an external, artificial one imposed over humanity in total disagreement with the human nature.
Philosophy is, in contrast to ideology, concerned with the understanding of the reality.
It is a speculative science which accepts the truth, the whole truth, as its subject-matter. The critical thing with the philosophy is the fact that its ideal content is at the same time the true form of the consciousness.