Demystifying Global strategy
Global strategy, as defined in business terms, is an organization’s strategic guide to pursuing various geographic markets. It consists of the Global Business Environment in which Global corporations, Multinationals and other firms operate. It introduces a concept of international strategy and gives some reasons why do companies go international like the Five keys to going global.

History of Global Strategy
As an interdisciplinary subject, GS studies  should look at (a) the Firm either in its domestic historical setting or its global interactions, (b) The history of global empires and their global interventions. (c) The historical cultural mosaic behind global strategy created by movement of people, goods and services, and (d) Global strategy thinking from the world of ancient philosophical literature.

(a) The rise of the (Global ) business firm
It looks like the first firm structure was created in India in either circa 500BC or circa 800 BC. The Shreni was an informal association of artisans, merchants and Traders. It could have also been a workers guild  Some claim that this structure also included a form of governance code and social institution that may have been a vehicle for charitable acts. By 960 AD, China had started developing business mechanisms to control the flow of capital.  However the oldest surviving global firm is a French Mint .

(b) The history of global empires and their global interventions.
There are those who argue that our modern economy has been shaped by the rise and fall of Global empires and the effect of imperialism. In addition to imperial power from ancient empires, there is also a growing body of work on American imperialism   a term that refers to the economic, military, and cultural influence of the United States on other countries.  A counter body of work lies on the topic of Soviet imperialism as distinct from the Russian Empire.

Some writings on the topic are listed below.
A Global and Unified System of Power| What happened to the American Empire ?Economic Imperialism in East AsiaGlobal Political Economy in Context of Evolution of Political-Economic Thought |Global Trade and Asian Empires

3 historical empires that had a strong impact on global trade |The Mongolian Empire |
The Roman Empire  Rome the City and the state  |Colonialism and NeocolonialismThe dynamics of China-Ethiopia trade relations |

(d) International Trade Thoughts
A seminal work here is that of Chi-Yuen Wu who addressed the evolution of economic thought.

The key components of the Global Strategy landscape are composed of :

The Globalisation debate |

How Global Are We?
Importing and Exporting  Export licensing decisions Doing Business Profiles of markets
Why Do Nations Trade?
Absolute Advantage
Comparative Advantage
Gaining and sustaining competitive advantage
The Multinational corporation |
When to Go GlobalDeciding to Go International
The globalization of business
Target Market Selection
Market Attractiveness

A map of the curated resources around global strategy can be viewed here.  If you are looking to read more, a list of Free Textbooks is useful to start exploring the subject.