Man.

Let us take a look at what Mark Twain had to say:

Here’s a question that was posed to the Dalai Lama:

“What surprises you most about humanity?”

His answer was as follows:

“Man”
“Because he sacrifices his health in order to make money,
Then he sacrifices his money to recuperate his health,
And then he is so anxious about the future that he does not enjoy the present.
And as a result, he does not live in the present or the future,
And he lives as if he’s never going to die, and then he dies having never really lived.”

And dare I say, “Woman” too, lest the Dalai Lama, or I, or both are accused of sexism?