We still cannot explain exactly how or why the "collapse of the wave function" happens without relying on an observer. Go to product viewer dialog for this item.
He evaluates alternative "realist" interpretations, including Louis de Broglie’s Pilot Wave theory , Objective Collapse theories , and the Many-Worlds interpretation . He points out the flaws he sees in these, such as the Many-Worlds' lack of clear probability and its "magical realism".
Smolin explains that Einstein initiated two revolutions in 1905: relativity and the quantum revolution. The latter remains unfinished because:
Einstein's Unfinished Revolution: The Search for What Lies Beyond the Quantum