Many people say that science knows no borders, and there are indeed many scientists who publish their inventions for human beings to enjoy for free. The famous Tesla invented the AC power supply system in order to compete with Edison for that scientist. It must be said here that it is Tesla's selfless dedication that makes people use cheap electricity. Tesla himself did not make a fortune. Edison was a great inventor and patent applicant, so he applied for many patents and made a lot of money. It can be said that Edison invented things for money. In addition, the Hou's soda production law in the Republic of China broke the technical secrecy blockade of western soda production and invented a new soda production process, which greatly reduced the cost of soda production and brought great benefits to mankind. Many people suggested that Hou apply for a patent, but he disclosed his alkali-making process to the world for free. Such scientists are admirable scientists and true practitioners of science without borders. But now it is more to advocate the protection of intellectual property rights, so that everyone can respect the achievements of scientists' labor. At the same time, many people, even the government, often claim that science knows no borders, especially in the west and the United States. On the one hand, they protect their own patents, on the other hand, they put forward the enjoyment of science and technology without borders. In particular, unreasonable demands are often made on China to enjoy a lot of technology with China. We can only say that although science has no national boundaries, scientists have national boundaries. We can communicate with each other, but we can't enjoy it for free
Don't generalize this topic. If you want to say it, you have to stand up to doubt. More specifically, it is the theoretical part of science, such as algebra, geometry, physics and other formulas, derivation and so on. Yes, you can learn by buying books. Besides, the money you spend is also for the publishing house. Of course, you have to pay for proprietary technology that can be directly converted into profits. Except for war and sanctions, they all belong to the category of commercial warfare.