A few questions on Evil

Hello, everyone! I have 2 questions on Evil: 1. How to wipe out all the default key maps which are present in `evil-maps.el' preferably with as few calls as possible? Note that I'm aware of how to do that with 1 by 1 `undefined' assignmetns, but I'm looking for something simpler. 2. Is this (evil-define-key 'normal global-map (kbd "<left>") 'do-something) indentical to (define-key evil-normal-state-map (kbd "<left>") 'do-something) ? Regards, Alexander.