<p>1) Unlike Charles Lamb. Horace Walpole actually set out to be the historian of his age.</p>
<p>Can someone explain why this sentence is correct as written? Isn't "his" ambiguous? </p>
<p>2) In a world that the rate of technological and social change accelerates frighteningly, change itself often seems to be the only constant. </p>
<p>"In a world that" is the correct answer. But what's the alternative? "In a world in which" sounds redundant.</p>