There are 6 species of great apes alive today, so why is there only one species of human?

"Our own species appeared around 200,000 years ago, at a time when several others existed. Yet today, only we remain." Why?

For the first 100,000 years of our existence, modern humans behaved much like Neanderthals. then something changed. Our tools became more complex, around the time when we started developing symbolic artefacts.... For tens of thousands of years, before we developed these abilities, modern humans and other hominins were fairly evenly matched.... Any other species could have taken our place....