I would think water moves the boats
Because of increasing sea ice.
In climate change taking place since then, there has been an opposite problem. Beginning in the late 19th century, a reduction of sea ice has been progressing in the Arctic regions. The pace of ice mass loss has been accelerating especially since the 1970s. In the first decade of the 21st century, Greenland's ice loss accelerated at a rate of 30 gigatonnes a year.
Poverty was caused by many factors in the 1800s: Unemployment – families had no means of support. Large families – many children had to be catered for. ... No national social security system to protect people against the worst effects of sickness and unemployment.
