
Mumford explains the forces that have shaped technology since prehistoric times and shaped the modern world. He shows how tools developed because of significant parallel inventions in ritual,

The only news is the wind has continued to blow. It has slacked off from time to time during the past three days but has never quit. This morning when we went for our walk it was not blowing very hard but with the lower temperature the wind chill was around 35-36°F so I was wearing my winter coat and gloves.