vorsa, as in everything context is all.
In your quotation Robert F. Kennedy
is speaking to young people at The University of Capetown,South Africa
on June 6, 1966. The "injustice" he spoke of is not just the introduction of a new work practice.
He also said in that address:
"There is," said an Italian philosopher, "nothing more difficult to take in hand, more perilous to conduct, or more uncertain in its success than to take the lead in the introduction of a new order of things." Yet this is the measure of the task of your generation, and the road is strewn with many dangers.