Why can American science and technology lead the world?

America's leading technology in the world was gradually established after World War II. Despite the recent economic downturn in the United States, American science and technology still has an absolute advantage in the world, and this advantage may not be shaken by any country for a long time to come. This is an important reason why many people are optimistic about the economic prospects of the United States. At present, the United States has strong advantages in energy, environment, information and communication, biology, manufacturing, materials, transportation, aerospace, automation and other technologies; The United States has the most outstanding scientific and technological talents in the world; American scientists publish the most scientific papers; American citizens get the most patents at home and abroad; The United States has produced many world-class scientific research instruments and equipment, developed various advanced scientific research methods, and greatly promoted scientific and technological progress.