It improved New Yorks economy and was the second longest canal at the time it was built
A contract is an agreement, usually written out on a legal document, in which it states terms and agreements, as well as rewards that would be given at the end when the terms are met.
For example, a contract for assassination may be posted out in the black market. An assassin would then agree to take on the requirement of the contract. If it is met, the payment would be given to the assassin. If not, then the contract becomes void. This makes contracts important because the terms and everything is written down, and can be looked on for future references.
~
Answer: Being Polytheistic for one, as they worshipped different Gods. And by creating new weapons and technology, and they also had Ancient Statues(The most known is The Athena Partheanos), and Temples(The most know is the Parthenon at Athens, that is the most sacred Temple).