Complex sentence: Savigny argued that jurisprudence should be saved from the hollow abstractions of such a work as the' of Christian Wolff, and that a "historical study of the positive law was a condition precedent to the right understanding of the science of all law".
Split into simpler sentences: Savigny argued that jurisprudence should be saved from the hollow abstractions of such a work as the' of Christian Wolff. Instead, according to Savigny, the "historical study of the positive law" is "a condition precedent to the right understanding of the science of all law".