 As we have seen, there are ongoing philosophical debates regarding future contingents. There is still a focus on the questions represented in the diagram, but other problems are also discussed. One problem which has attracted much attention is the study of future contingents as seen in relation to branching space-time and various ideas within physics. Here Belnap (1992, 2003, 2005), Müller (2007, Müller et al. 2008), and Placek (2000) have contributed significantly.