yes that's true.yeah we have achieved a lot and people will continue achieving things.
But yes you are right, Lots of people are selfish, this actually stops progress.
If people are making money of something, they dont want things to change, if those things wont make them money.
Probably something in every industry like this, the Energy sector is a big one for example.
Technically anything can be a source of energy if used in the right way / under right conditions.
Its just a matter of finding the way and the right conditions which is the hard part.
i have heard how some things are always kept hidden because people can't make money off of the current things like some diseases and such but i have no proof. but if this is actually true. it's just too cruel