You need to elaborate more on your examples. At the moment, you are not using them to actually prove your points. You are simply assuming that the reader will see what you intend the examples to prove, but this isn't necessarily the case.
His finding led the world to understand that adaptation is the source of speciation. If he had not done so, people would continue to believe that god created all the animal biodiversity on earth.
You're right. If Darwin had not questioned authority, there would be unity where there is now bitter acrimony, and traditional values would have been strengthened rather than weakened, and the current cultural malaise that afflicts us would have been avoided. Questioning authority is therefore clearly wrong . . . oh, wait, no, you want to argue the opposite of that. So, you need to take the next step and explain why Darwin's theory was such a good thing, rather than waiting for the reader to fill in the blanks.
If the citizens had the right to question their leader, their power would increase and their condition would improve.
Why? How? Again, you don't take the final step and answer these important questions. Perhaps allowing people to question the Dear Leader's supreme authority would in fact lead to civil war and a worsening of conditions. You provide no reason to believe otherwise in your essay as it stands.
He disrequarded this order and entered the area to inquire what was not explained to him and was almost shot.
And again . . . The solider questioned authority, and as a result almost died. If he had not questioned authority, he would have been much safer. How does this show that questioning authority is a good thing?
uestioning authority has the potential to escalate to chaos. Events in history such as the beating of Rodny King or the recent reelection of Ahmad Jinadad have led people to question. Both situations resulted in mass violence and death. Nevertheless, if questioning brings a positive impact then it must be done despite resistance.
But you haven't shown that there is a positive impact, which is the main problem with this essay throughout.