I am not sure just what Marx had in mind when he wrote that "philosophers have hitherto only interpreted the world in various ways; the point is to change it." Did he mean that philosophy could change the world, or that philosophers should turn to the higher priority of changing the world? If the former, then he presumably meant philosophy in a broad sense of the term, including analysis of the social order and ideas about why it should be changed, and how. In that broad sense, philosophy can play a role, indeed an essential role, in changing the world.

Language would have evolved first as an internal object, a kind of "language of thought" (LOT), with externalisation (hence communication) an ancillary process. I can't review here the strong and growing evidence to support this conclusion, but I have elsewhere. There are ample reasons why having a LOT would confer selectional advantage: the person so endowed could plan, interpret, reflect, etc., in ways denied to others.

Everybody's worried about stopping terrorism. Well, there's a really easy way: stop participating in it.

Death and genitals are things that frighten people, and when people are frightened, they develop means of concealment and aggression. It is common sense.

If you're teaching today what you were teaching five years ago, either the field is dead or you are.

If some small storekeeper somewhere decides he's not going to pay the money, the Godfather doesn't let him get away with it. The money doesn't mean anything to him, but he sends in his goons to beat him to a pulp. You have to establish credibility, otherwise conformity to your orders will tend to erode. International affairs runs in much the same way.

The earthquake in Haiti was a class-based catastrophe. It didn't much harm the wealthy elite up in the hills, they were shaken but not destroyed. On the other hand the people who were living in the miserable urban slums, huge numbers of them, they were devastated. Maybe a couple hundred thousand were killed. How come they were living there? They were living there because of-it goes back to the French colonial system-but in the past century, they were living there because of US policies, consistent policies.