I don't understand what your exact plan is. Are you trying to come up with different events in time that have affected the strategies of airlines? If so, you seem to have listed a few recent ones. Others include the development of the internet (cut down the need for travel), the introduction of new airplanes (the 747, 380 and 787 all opened up new routes/traffic patterns), regulation/de-regulation and macroeconomics (travel expenditure tends to positively covary with economic conditions). The list can go on. As aacharya said, I think you need to be more specific and introduce more structure into your thesis.

PS: I don't know what the goal of your research is. But I think it would be really interesting if you could say something like "In the past, we saw that airlines adapted to events X and Y by doing A and B respectively. Today, I forsee event Z happening. Because of the reactions to A and B in the past, I think that airlines will adopt strategy C if event Z happens."