The ICC held its 16th Congress in the 30th year of its existence. In this article we therefore intend, as we did on the 10th and 20th anniversaries of the ICC, to draw up a balance sheet of our organisation's experience. This is not a sign of narcissism: communist organisations do not exist by or for themselves; they are instruments of the working class, to which their experience belongs. This article thus aims, as one might say, to return our organisation's mandate for its 30 years of existence to the class. And as always in returning a mandate, we must determine whether our organisation has been able to live up to the responsibilities that it took on when it was formed. We will therefore begin by asking what were the responsibilities of revolutionaries in the situation of 30 years ago, and how they have changed since then, as the situation itself has changed.