the sherman wasent the BEST tank of ww2, but it was the right tank at the right time.
More precisely- a tank which didn't break down
too often, and worked like a car, thus enabling our largely unskilled workforce to assemble them in great numbers. From all accounts, nobody liked anything but its speed, the armor was thinner than German tanks, the gun was smaller, and its range was shorter. The only thing it could do, was get going, and keep going quickly.
The Sherman was also inferior in many ways to the revolutionary T-34 tank, which could literally smash through enemy Panzers. The sloped armor allowed for great protection from ground-based as well as air-based threats. This allowed T-34s to swarm over their adversaries, and simple construction along with intuitive controls ensured a nearly inexhausitble supply.
-Penguin