To argue: Progress, progression, to make us go further. To make things better. If you start with a statement, like saying progression is to make the lives of people in the world better, you can either, objectively, approve this or you can question it. Is progression to make the lives of people in the world better?
You can discuss this and conclude with something objective. Like saying that progress in the world most definitely must be making people's lives better, because lives of people is the most absolute we have in this world. The more time you use on this discussion the more objective it will be. Because there is an objective answer, you just have to find out what it is. This particular questioning don't have to be done right now, though.
If progression is to make the lives of people in the world better, in what way do you do this. You could say by evolving, developing and expanding the sciences, which follows objective reasoning, it would better the lives of people. Why would you do this, and not something else? Because it is so important.
I don't know if I proved my point with this.