What If We Killed All Spiders?

They’re in your yard, on your walls, in your attic, and there’s probably one near you right now. The thought of these creepy crawlers might make you want to go on an immediate spider crusade. With global numbers in the quadrillions, it would be 2.8 million spiders versus every human. My bet is on the spiders. Maybe with a large-scale international effort, spiders could be eradicated. Just imagine a spider free world! What would happen to other bugs? Would we see an increase in disease? How would it change the future of medicine?