If
A) God designed the human body
and if
B) Capitalism best aligns with human existence
then the human body is designed to meet the challenges of rigorous competition. But the human body seems to operate the best in a highly cooperative environment. A contradiction! So either A is false, B is false, or A and B are false.
(It’s been more than a decade since I took a class on rhetorical logic so I probably got the form wrong.)