Mauro says:

If I remember correctly from
If I remember correctly from my biochemistry studies both Haldane and Oparin agreed that "generating" the basic stuff of life like the twenty alpha-amminoacids and the proteinoids is not that that hard. Stanley Miller demonstrated that in the ’50s once he brilliantly understood that a reducing atmosphere was needed.
The problem is "putting the bricks together" as I like to say. Ever since Miller’s experiment there have been all kinds of academic speculations about the origins of life, both on Earth and on other worlds.
RNA worlds have been proposed, as well as substitutes to DNA, problem is that according to our present knowledge we first need to have a ribonucleic acid (or equivalent) and then bases, amminiacids, proteinoids etc. Sadly nobody has yet solved this fascinating problem.