Modern medicine absolutely short-circuits natural selection. If you have an older sibling who was delivered via C-section chances are you wouldn't exist.

That’s not true for the USA however.

The large award for a medical malpractice trial was the reason for doctors pushing for a C-section if there’s any possibility of a complication. (Sometimes called defensive medicine.)

Most people point to the cases won by John Edwards, trial lawyer and vice presidential candidate as the reason for the great increase in C-sections. His case wins include 30 trials at which he won at least $1 million dollars each.

In my generation (80s-90s) pretty much everyone in Brazil that was born in a hospital was born through C-section. Only recently did the practice of defaulting to c-section is beginning to fade.

[deleted]