The problem for evolution lies in the fact that if I evolved from a microbe, then every one of my thousands of transitional ancestors must have played -and won- that game of chicken with extinction. And this is true -to a greater or lesser degree- for every creature alive today.
Yes if one assumes that the goal, microbe, X number of steps, human was a directed goal, but since there is no specific goal, then any step would have any given chance of improving survivability for there are 3 possibilities per mutation, harmful, neutral or beneficial thus there is a one in three chance of improving and 2 chances out of three of survival to go one step further.
There is no better love between 2 people than mutual respect for each other WT Young, 2002
Who gave anyone the authority to call me an authority on anything. WT Young, 1969
Since Evolution is only ~90% correct it should be thrown out and replaced by Creation which has even a lower % of correctness. W T Young, 2008