There has been attempt by scholars to connect European Late Antiquity to other areas in Eurasia. To an extent most centralized kingdoms within proximity to Steppe grasslands faced major challenges or in some cases complete destruction in the 5th–6th century in the case of nomadic invasions and political fragmentation. The Western Roman Empire in Europe and the Gupta Empire in India, and the Jin in North China were overwhelmed by tribal invasions. Nomadic invasions along with worldwide natural climate change, the Plague of Justinian and the rise of proselytizing religions changed the face of the Old World. Still disconnected was the New World who also built complex societies but at a separate and different pace. By 500 the world era of Post-classical history had begun.