Lamb. In legend, the pelican pecks at its breast to feed its young with its own blood if food is scarce. It is a symbol of unselfish love, charity and sacrifice, and therefore of Christ who gave his own life to save humankind from sin and death.
Women were not allowed to participate in decision making in the colonial times. They might have influenced their husbands, but could not directly participate.
Actually the real answer is the second and first world war pouring money into the us economy for output. If that is not an option it would be the invention of the steam engine and the 1800's locomotive industry.
