"Unity over division" attempts to substitute an artificial unity for the real thing: the perfect unity of Christ that transcends all differences not by diminishing them, but by bringing about conformity to Christ and his word by the power of the Holy Spirit.
For individual Christians, the advice is simple: give more and more effectively. Those Christians who did inhabit the Positive and Neutral Worlds should think seriously about how they can use their estate to advance God’s Kingdom, and whether they can give more in the present. They should also consider narrowing their giving scope. Your alma mater whose values continue to diverge more severely from your own? Remove them from your support list.