When we learn something, we incorporate it into our own pattern of previous knowledge. This always requires some custom tailoring. Thus, people feel ownership of their new ideas. Even if your contribution is 90% of what someone else is saying, they remember the idea as being born when it first made sense to them, due to some link that only exists in their own head. In China, "intellectual property" is a very foreign concept. Ideas evolve best if they circulate freely, unless nobody can afford to pay for the physical work involved in development, in which case patents, copyright, etc. can squeeze some support from the economic system.
Everyone owes most of their ideas to others. "If I have seen farther than any before me, it is because I stand on the shoulders of giants."
Winston Churchill said that it was pretty easy to get almost anything done if you didn't care who got credit. Perhaps it is enough to see your ideas being promoted by more people.
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"Talent hits a target that nobody else can hit.
Genius hits a target that nobody else can see."