You ask me to kill a man for $70,000 and you call it serving mankind.

His whole life devoted for serving humanity and mankind.

Indeed adobe construction, which dates back 10,000 years, may serve mankind for centuries to come.

Those poor robots had scarcely ever seen a human being, yet they were designed to serve mankind.

We contribute our bodies and efforts to serve mankind.

How well can we continue to serve mankind from a prison?

The final machine, perfect and beautiful, created to serve mankind forever.

To be sure, it had served mankind for five hundred years.

"I am ready to continue serving mankind to the best of my abilities," I reply.

On the contrary, nature should be preserved and made to serve mankind in a proper way.