Final answer:
Nelson Mandela fulfilled the need for self-transcendence by going to prison for his beliefs, as he demonstrated a purpose beyond himself and worked towards the greater good.
Step-by-step explanation:
By going to prison for his beliefs, Nelson Mandela fulfilled the need for self-transcendence according to Maslow's Hierarchy of Needs. This level, which exists above self-actualization, represents striving for meaning and purpose beyond one's self, including efforts to improve conditions for others or to make a political statement. Nelson Mandela's choice to sacrifice his freedom for the greater good of his countrymen and the anti-apartheid movement epitomizes this highest need level on Maslow's revised pyramid.