I believe humanity has evolved to opting for more rather than settling for less. This 'more' comes with implications that we may not be ready for.
Contentment is great gain, helps to direct the mind to what we desire. We humans are resistant to change but when we see the importance of an item offered, we open our arms in full.
Can we ever have 'enough' in the context and pursuit of 'more'?
Perhaps though it's more a devolution though?