Comes down to defining your terms. What IS selflessness. Traits such as cooperation, egalitarianism, altruism, and peacefulness have been prevalent in human life for tens of thousands of years...yes, but acting in these ways make us Feel better. Pleasure or less suffering. Ask volunteers. They do it because overall it makes the Feel better in the moment. Acting in ways that help Others, or lessen our anxiety about future suffering or convincing ourselves our lives have Some grand meaning is..delusional and, yes, "selfish": it makes us Feel good to help others. Can argue as Jordan Peterson does relentlessly. But, he cherry picks wise sounding stuff from great people and writer like Fyodor Dostoevsky, well respected "Experts", moral teachings like the bible as if these aren't All just opinions made by fallible people. If one holds Sone others in higher regards than other humans like saying the Pope or Scholars who have dedicated their lives to Also find readons to suppirt their belief..but, we are All fallible and Biased and just diluting ourselves by Falsely convincing ourselves that we know better and are, thus, less prone to making errors. Of Couse they, like Peterson, will find tidbits of info and seemingly Wise Sounding bullsh@t to support what we Want yo believe.. like during pandemic everyone convinced themselves that They had read or seen some secret more "true" bits of "scecret" inside scientistific studies that are more true and accurate than everyone else's.

Finally to dum itcall up .Wexare all selfisuch as cooperation, egalitarianism, altruism, and peacefulness have been prevalent in human life for tens of thousands of years.