translation.ar: لقد تطورت لعالم يعيش فيه الناس في مجموعات صغيرة جداً، نادراً ما تلتقي أي شخص مختلف بشدة عن أنفسهم، لديهم حياة قصيرة فيها القليل من الخيارات والأولوية القصوى كانت أن تأكل وتصاحب لليوم.
translation.en: They were evolved for a world in which people lived in very small groups, rarely met anybody who was terribly different from themselves, had rather short lives in which there were few choices and the highest priority was to eat and mate today.