He explains various points of view and gives his opinion. So just because he mentions a point of view in his book doesn't mean that he endorses it. His writing style requires one to pay attention to the context to see what he says about it. Here's a dramatic example where he temporarily writes from the point of view of the godless in order to grab the reader's attention:
"If we open our eyes, isn't what is said in the parable [of the wicked tenants] actually a description of our present world? Isn't this precisely the logic of the modern age, of our age? Let us declare that God is dead, then we ourselves will be God. At last we no longer belong to anyone else; rather, we are simply the owners of ourselves and of the world. At last we can do what we please. We get rid of God; there is no measuring rod above us; we ourselves are our only measure. The 'vineyard' belongs to us. What happens to man and the world next? We are already beginning to see it..." - Joseph Ratzinger (Pope Benedict XVI), Jesus of Nazareth - Vol I, p. 257
He presents the points of view, but also distinguishes between them. However, in all cases, to see the need for change for the good, requires openness to change, rather than resistance, i.e. progressive vs conservative.
But he goes on to explain the problems where change is done out of mans rationalization, vs the God's.
The former he refers to as revolt, while the later is reform.
Also, for a change to the good, it must be done with moral reason, rather than human reason, which become like a religion in our society.
When I read this book, we were at the beginning of the invasion of Iraq. I reflected on how the term, "democracy" was used by the Bush administration and those who supported the war with the idea we would bring democracy to a society which was begging for it.
In this case, "democracy," became like a religion to those who promoted it in the war, and of course, it was thrown right back in our faces by the new Iraqi government.
In all of this, what Pope Benedict XVI is saying in the book is that yes, we desire change for the good of mankind, but change must be based on God's law. In fact he says the Ten Commandments should be used as the guideline.
At the same time, he rejects the conservative approach of keeping the status quo, by those who are the only one's benefiting from it.
Jim