What controversy did Alfred Russel Wallace cause about anything?

Question

his theories, Anything

Answer 1

He came up with the theory of natural selection-- evolution-- about the same time Darwin did, but Darwin published first.

So you could attribute the controvery over the theory of evolution to him.

BTW, his middle hame is "Russell" instead of "Russel." Probably just a typo, but if you look under that spelling you should find a lot of information about him.