Time would be more apt for the title "The Necessary Evil" though it's not really necessary. A bushman in the Kalahari or a South American tribe may not understand the concept of time yet they live, quite happily at that. Time, according to me, is the one thing that man has invented to bring about his own downfall.
Imagine life in 21st century with all latest gadgets, job, money everything except time. If stress was unknown in the old days, it was because time was not important. If life travels at a fast pace, then time is the cause, because time leads to the need for speed. With time, we know when our next project is due, when the homework is for. Imagine there was no concept of time. Words such as deadlines, time-limit, tomorrow, yesterday and even stress and anxiety wouldn't exist.
What if your teacher told you that you have to do a certain project, but didn't know how to say"Bring it by tomorrow." That would be ultimate!!