For an example of famine, look up Goldman Sachs, Merrill Lynch, and Ethiopia:

http://www.independent.co.uk/voices/commentators/johann-hari...

For genocide, try looking up the 1954 Guatemala coup, in which case the CIA got involved directly at the behest of Coca-Cola and the United Fruit Company (now Chiquita).

I haven't read this book yet, so I don't know about "triggered" vs. "enabled," but it seems relevant (came up in a talk about American companies providing deep packet inspection / internet censorship tools to, eg., Iran.)

https://en.wikipedia.org/wiki/IBM_and_the_Holocaust

http://www.ibmandtheholocaust.com/