Positive- The positive effects of the "cotton gin" was that it made producing cotton so much easier. Before Eli Whitney invented the "cotton gin", picking the seeds out of the cotton plants were so laborious and time consuming. but now, it was easy and fast, and farmers made much more money.
Negative- The negative effects of the "cotton gin" was that it made the need for slaves greatly increase, and the number of slave states shot up. Plantations grew, and work became regimented and relentless (unending).