No; compassion and naive morality is usually sufficient. A well-developed ethical system is good, and typically out-performs the former, but avoiding being outright evil without outside influence is easy.
I might have a broader definition of ideology than you because morality and ethical systems are ideology. Look how many different moral and ethical systems we have. Just choosing between what exists requires ideology first.
No; compassion and naive morality is usually sufficient. A well-developed ethical system is good, and typically out-performs the former, but avoiding being outright evil without outside influence is easy.
I might have a broader definition of ideology than you because morality and ethical systems are ideology. Look how many different moral and ethical systems we have. Just choosing between what exists requires ideology first.