The History of Mexico City

All trade had to be done overland, which automatically makes everything ten times slower and ten times more expensive to ship. The roads of new spain were always garbage. And the hapsburgs never thought those roads worth investing in. But expansion north did lead to conflict with the indigenous populations that did live in the regions. So there was a continuous run of wars and revolts for the whole 17th century. By about 16 hundred, the spanish viceroyalty in central mexico was well abolished.