Saying that they were intended for hedging sounds like a very strong proposition to me. Chicago-style futures have (and have had, for as long as we know) numerous features that indicate speculation (or gambling, as it's also known) as one of their big reasons for existence.

They are also used to sell unconventional services (being long corn in August and short corn in July is effectively selling the service of transporting corn back in time) and,

perhaps most importantly, to make commodity loans (being long corn in the cash market and short corn in the futures market is a loan of corn.) This helps explain why, after removing costs of storage and insurance and such, prices are almost always in backwardation.