havenow, every time you technology, we as a society should worry about it. ai, being one. greater the role technology plays in society, i think more you have to use it to service the people at the bottom. talk about the value of making mistakes. you ever worry about overusing -- >> everything is a matter of gradation. society, the world depends too much on us. a hundred people, a thousand people, 100,000 people. notoes not mean you should encourage risk. it should encourage its mammoth lose 5% orfail and 10% of your assets, your succeef these 60, you double your market capitalization. i think this is key to innovation because risk is key to innovation. if you discourage failure or don't reward intelligence failure, then you are not allowing yourself succeed in the long run. emily: thank you so much joining us today. it has been great to have you. vinod: it has been fun to be here. ♪ terre: we asked some of the best minds in the world from business, government, the arts, academia, what are the most urgent problems facing humanity, and how do we solve them? the result is "bi

you havenow if any of watched "hell on wheels" but the awnee don't get the credit on that show or anywhere else. had brought work on the union pacific line virtually to a halt. the army was incapable of catching these fast-moving, rating -- raiding bands of indians. warriorson of pawnee were recruited as regular soldiers. here is the battalion of two companies, a marvelous painting. e battalion mold a cheyenne war party so badly that raids on the railroad virtually stopped. i personally, from work on my book, think it is fair to say ehat the action of the pawne battalion shaved at least a year or more of the construction of the transcontinental railroad. who did chinese workers so much work on the central pacific railroad, the pawnee have been lost to history. as distractive as the fighting between tribes was, the what iibal fighting, think ultimately doomed the indian resistance was the end of the -- inability of individual tribes to maintain cohesion against the white threat. the only tribes that were united during this. were the tribes that accepted crow, pawneesence, . none of the trib