First, us humans prefer killing each other to science. This is a proven fact.
Second, humanity did not go from Horses to Nukes, a very very small percent of the population did it, those geniuses have everyone else standing on their coat-tails.
The next leap will be by a very small group that is significantly more enlightened than the rest of the 99.95% of the population. If those people are benevolent, then everyone enjoys the fruits. If they are not....... Well, things can go very differently.
Currently with how education is going, the general population is becoming more uneducated every year. WE do not glorify learning, but instead glorify morons that can carry a ball, or can sing a tune. And we Vilify in society those that do love learning and are very smart.
Honestly Humanity is a joke, almost a cancer. And if an advanced civilization stumbled across us, they would probably wipe us out to make the rest of the universe safer. We as a species love to hate others, we love murder, war, and control. WE thrive on hating those that are different or think or worship different.