How did the dinosaurs evolve?

How would humans evolve in a world inhabited by dinosaurs?

• How might humans have come into existence if the world was inhabited by dinosaurs and small(?) mammals?

• Answer:

  Better. Since we would have to be more efficient and work as an organized team more often in order to survive. The development of traits like bureaucracy, procrastination and online marketing would have been significantly delayed. Web 2.0+, Angry Birds, Instagram, Snapchat and push notifications would have been deprioritized in favor of something that is more obviously useful to the humanity. Today, a lot of people would argue that the above are useful. At risk of being eaten tomorrow, efficiency and reliability would have been the most important property of communication, outclassing any bells and whistles by a margin. Although I was dreaming. Take it back. The humans would just hold off the dinosaurs and move on same way. We would just have developed powerful machines capable of fighting dinosaurs slightly earlier. Nothing would have changed after that.