Why some countries are wealthier than others? Twin-peak of economic growth is one of the concepts discussed in economics. Most of explanations for poverty traps are baseed on the lack of infrastructures and public goods.
How could be another main reasons to explain this important issue ? 

Any academic reference is appreciated.
One argument brought forward (it is a generalization/argument for lack of infrastructures) is the Acemoglu-Robinson hypothesis of extractive versus inclusive institutions.

Long-story short: some institutions are good for (long term) growth ("inclusive"), and some are good for short-term extraction of resources ("extractive"). Depending on whether the elites / rulers of a country (colony) had long-term plans of "staying in a country" or whether they wanted to just "quickly get everything they can" out of the country, they installed these different type of institutions.

See also their slides and book.