system
Given the following post, respond as if you're commenting on Reddit:
human
Why is it that human babies take so long to learn how to walk, as opposed to most other mammals?

Surely it'd be benificial for survival if the smallest could walk? Why did evolution decide it wasn't a good idea?
gpt
As with most developmental priorities its a question of when to invest. 

Some mammals have immediate needs like ungulates: cows, horses, etc. and their offspring develop limps that can be used very soon after birth often in under an hour. Their mothers cannot carry them and there aren't places to hide the grasslands and steppes they live on. It is imperative they walk as soon as possible to escape predators.

Other mammals like rats have young in nests that are helpless and can't walk for quite a while but are protected and hidden away by the mothers.

Human babies likewise have the alternative of being carried by their parents and while they do need to eventually walk it is not needed till later in life. Human parents are capable of not only moving the baby but can protect it. The child therefore does not require use of legs immediately.