How did Henry Parkes support federation through the Tenterfield oration?

Sir Henry Parkes, often referred to as the father of Australian federation, significantly advanced the cause of national unity through his 1889 speech in Tenterfield, a town in New South Wales.12

While Parkes had first spoken in favor of federation as early as 1867, his Tenterfield oration served as a vital catalyst for the movement. By delivering this public call for the federation of the Australian colonies, he provided a necessary stimulus that increased momentum toward the eventual creation of the Australian Commonwealth. This speech helped ignite a period of intense political activity, leading to more than a decade of negotiations and constitutional conventions that culminated in the federation of Australia in 1901.132