Why is it so hard for states to learn from history and, especially, from their own mistakes?

为什么要美国从历史中，尤其从自己的错误中，吸取教训是这样的难？

youdao

Why is it so hard for states to learn from history and, especially, from their own mistakes?

为什么要美国从历史中，尤其从自己的错误中，吸取教训是这样的难？

youdao