Simple really. We were all Africans some 60,000 years ago, then a tribe got a bit of wanderlust and left. More probably a corridor opened up along the coasts and we spread out. In Europe we encountered Homo neanderthalensis, in Java we met Asian Homo erectus and on Flores, the Hobbits Homo floresiensis. Did we kill them? Trade with them? Give them flu? Or out-compete them for a common resource? By c.30-25,000 years ago it was just Homo sapiens and the Hobbits… are they still around like old Indonesia legends say? Or was the eruption on Flores c. 12,000 bp their Waterloo?