Does the wording sound alright in this sentence.

War is the solution to the world's problems because global peace is
impossible to achieve. Nothing is better than having that basic
understanding on how in the end war would be justified and benefits
mankind.

3 answers

If you were to read this aloud, putting a comma on either side of "in the end" would allow a breath, if that were necessary. At the very end, try a parallel construction = "war would be justified and mankind benefited/benefitted."

Sra
Should one of those benefited be benefits?????
No -- use benefited.