Nigeria: What next, After Oil?

In 2005, EIA projected that crude demand by 2015 would be 103m bbl.
Today, it is actually 93m bbl - that's 10m bbl less than projected.

Major oil companies invested in technologies to get 103m barrels out
of the ground by 2015, so prices were bound to collapse. China is moving away from the heavy dependence on oil phase of economic development. Nobody's sure India will be the "next China".

By 2050 (35 yrs from now), Nigeria will be the 3rd most populous nation in the World. Also remember 1982 was 33 years ago. Why is 1982 significant? That was when we first experienced an oil shock & since then we've failed to adapt to obvious reality.

If we can't adapt 33 years & counting, what gives us the confidence
we'll be able to adapt 35 years into the future?