Answer:
They wouldn't have anyone to take care of the children and do all the house work.
A common explanation is that the Civil War was fought over the moral issue of slavery. In fact, it was the economics of slavery and political control of that system that was central to the conflict.
Some new inventions, designs and ideas that were created in the 1780s include:
-1780 Bifocal glasses were invented by Benjamin Franklin
-1780 The circular saw was invented by Gervinus
-1784 The threshing machine was invented by Andrew Meikle
-1786 The steamboat was invented by John Fitch
-1785 The working parachute was invented by Blanchard
-1785 The power loom was invented by Edmund Cartwright
Hope this helps! :)