The MSCI World is perhaps the most well regarded index for global stocks.
The MSCI World Index is a global cap-weighted index that serves as a good barometer for stock and economic performance of the world as a whole. If you are a global investor, the MSCI World makes for a very useful benchmark for performance.
The index is maintained by Morgan Stanley, and has over 1,600 stocks listed in it from all developed markets in the world. It does not include emerging markets or China.