The workers on collective farms have no incentive to do a good job. So they don't. And eventually Russia could not feed itself. Long before that we had the Stalinist purges of the 1930s, when millions of peasants were killed. Yes, because science is universal, its truths recognized everywhere, because they can be shown to any ignorant or skeptical person.
Universality leads to unanimity of thought which leads to unity in action.
Society will change when a majority of its leaders know what needs to be done. Thus, if our chief emphasis is on finding the truth, gathering the evidence, ruling out alternatives, doing the analysis, and then communicating the results, the utopian need not be concerned with the exact means for social change. They are going to be different in different circumstances anyway, so it is impossible to predict, as well as being unnecessary. All we need to do is create the discipline of Utopian Analysis as a legitimate and recognized science. High civilization is really defined by its arts, sciences and metaphysics.